From c3708c2e78ad5489718dde208c36db26a5163247 Mon Sep 17 00:00:00 2001
From: luozhixiong <luozhixiong@bytedance.com>
Date: Mon, 22 Jun 2026 20:28:31 +0800
Subject: [PATCH] feat: add framework-level output projection with --full

Adds a domain-agnostic output-projection engine to the shortcut runtime; a Projectable shortcut declares an OutputSchema and the runtime trims the default view to the curated whitelist, with a boolean --full to restore the full upstream payload. The 5 im read shortcuts are the first adopters; other domains are unchanged (projection is opt-in via OutputSchema). Message senders are tightened to {id, sender_type, name}; adds a jq-miss stderr hint.
---
 internal/output/jq.go                         |  30 +-
 internal/schema/types.go                      |   4 +
 shortcuts/common/projection.go                | 177 +++++++++
 shortcuts/common/projection_test.go           | 374 ++++++++++++++++++
 shortcuts/common/runner.go                    |  63 ++-
 shortcuts/common/types.go                     |  15 +
 shortcuts/im/convert_lib/content_convert.go   |  18 +-
 shortcuts/im/convert_lib/helpers.go           |  41 +-
 shortcuts/im/im_chat_list.go                  |  31 +-
 shortcuts/im/im_chat_messages_list.go         |  24 +-
 shortcuts/im/im_chat_search.go                |  33 +-
 shortcuts/im/im_feed_group_list.go            |  29 +-
 shortcuts/im/im_feed_shortcut_list.go         |  21 +
 shortcuts/im/im_flag_list.go                  |  38 +-
 shortcuts/im/im_messages_mget.go              |  19 +-
 shortcuts/im/im_messages_search.go            |  15 +-
 shortcuts/im/im_threads_messages_list.go      |  19 +-
 .../lark-im/references/lark-im-chat-list.md   |   9 +
 .../references/lark-im-chat-messages-list.md  |   2 +
 .../lark-im/references/lark-im-chat-search.md |   9 +
 .../references/lark-im-feed-group-list.md     |   9 +
 .../references/lark-im-feed-shortcut-list.md  |   9 +
 .../lark-im/references/lark-im-flag-list.md   |   9 +
 .../references/lark-im-messages-mget.md       |   2 +
 .../references/lark-im-messages-search.md     |   2 +
 .../lark-im-threads-messages-list.md          |   4 +
 skills/lark-shared/SKILL.md                   |   4 +
 27 files changed, 918 insertions(+), 92 deletions(-)
 create mode 100644 shortcuts/common/projection.go
 create mode 100644 shortcuts/common/projection_test.go

diff --git a/internal/output/jq.go b/internal/output/jq.go
index 414a8cde6..ed599b24c 100644
--- a/internal/output/jq.go
+++ b/internal/output/jq.go
@@ -19,7 +19,8 @@ import (
 // Complex values (maps, arrays) are printed as indented JSON with Go's default
 // HTML escaping (<, >, & → <, >, &).
 func JqFilter(w io.Writer, data interface{}, expr string) error {
-	return jqFilter(w, data, expr, false)
+	_, err := jqFilter(w, data, expr, false)
+	return err
 }
 
 // JqFilterRaw is like JqFilter but disables HTML escaping when re-marshaling
@@ -27,17 +28,30 @@ func JqFilter(w io.Writer, data interface{}, expr string) error {
 // carries XML/HTML content that must survive --jq '.data.document' style
 // projections without getting mangled into < escapes.
 func JqFilterRaw(w io.Writer, data interface{}, expr string) error {
+	_, err := jqFilter(w, data, expr, true)
+	return err
+}
+
+// JqFilterCount applies expr to data, writes results to w, and returns the
+// number of result values produced (0 = empty result; drives the on-demand
+// full-only miss hint).
+func JqFilterCount(w io.Writer, data interface{}, expr string) (int, error) {
+	return jqFilter(w, data, expr, false)
+}
+
+// JqFilterRawCount is JqFilterCount with HTML escaping disabled (see JqFilterRaw).
+func JqFilterRawCount(w io.Writer, data interface{}, expr string) (int, error) {
 	return jqFilter(w, data, expr, true)
 }
 
-func jqFilter(w io.Writer, data interface{}, expr string, raw bool) error {
+func jqFilter(w io.Writer, data interface{}, expr string, raw bool) (int, error) {
 	query, err := gojq.Parse(expr)
 	if err != nil {
-		return errs.NewValidationError(errs.SubtypeInvalidArgument, "invalid jq expression: %s", err).WithCause(err)
+		return 0, errs.NewValidationError(errs.SubtypeInvalidArgument, "invalid jq expression: %s", err).WithCause(err)
 	}
 	code, err := gojq.Compile(query)
 	if err != nil {
-		return errs.NewValidationError(errs.SubtypeInvalidArgument, "invalid jq expression: %s", err).WithCause(err)
+		return 0, errs.NewValidationError(errs.SubtypeInvalidArgument, "invalid jq expression: %s", err).WithCause(err)
 	}
 
 	// Normalize data through toGeneric so typed structs become map[string]any.
@@ -45,6 +59,7 @@ func jqFilter(w io.Writer, data interface{}, expr string, raw bool) error {
 	// Convert json.Number values to gojq-compatible types.
 	normalized = convertNumbers(normalized)
 
+	var count int
 	iter := code.Run(normalized)
 	for {
 		v, ok := iter.Next()
@@ -52,13 +67,14 @@ func jqFilter(w io.Writer, data interface{}, expr string, raw bool) error {
 			break
 		}
 		if err, isErr := v.(error); isErr {
-			return errs.NewAPIError(errs.SubtypeUnknown, "jq error: %s", err).WithCause(err)
+			return count, errs.NewAPIError(errs.SubtypeUnknown, "jq error: %s", err).WithCause(err)
 		}
 		if err := writeJqValue(w, v, raw); err != nil {
-			return err
+			return count, err
 		}
+		count++
 	}
-	return nil
+	return count, nil
 }
 
 // ValidateJqFlags checks --jq flag compatibility with --output and --format flags,
diff --git a/internal/schema/types.go b/internal/schema/types.go
index 084ca4691..02d8fe9b9 100644
--- a/internal/schema/types.go
+++ b/internal/schema/types.go
@@ -61,6 +61,10 @@ type Property struct {
 	Required         []string      `json:"required,omitempty"`
 	Properties       *OrderedProps `json:"properties,omitempty"`
 	Items            *Property     `json:"items,omitempty"`
+	// Projected marks a response field for the schema-curated default view: the
+	// output projection engine keeps it by default and hides unmarked fields
+	// (recoverable via --full). Carries no security/permission meaning.
+	Projected bool `json:"projected,omitempty"`
 }
 
 // Meta is the Lark-specific extension namespace.
diff --git a/shortcuts/common/projection.go b/shortcuts/common/projection.go
new file mode 100644
index 000000000..9b9e9acc5
--- /dev/null
+++ b/shortcuts/common/projection.go
@@ -0,0 +1,177 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package common
+
+import (
+	"encoding/json"
+
+	"github.com/larksuite/cli/internal/schema"
+)
+
+// ProjectBySchema trims data to the schema-curated default view.
+//
+// full==true / props==nil → passthrough (fail-open, never drops information).
+// Otherwise the input is normalized to canonical JSON values first, then the
+// core keeps only fields whose Projected==true (a field shows iff p.Projected
+// || full). It rebuilds maps/slices (never mutates input), skips missing keys
+// (no null padding), and carries zero business knowledge.
+//
+// Normalizing first is what makes this robust by construction: whatever native
+// Go type a command emits — a typed slice ([]map[string]interface{}), a struct,
+// a typed map, anything JSON-serializable — collapses to canonical
+// map[string]interface{} / []interface{} / scalars, so the core's finite switch
+// is COMPLETE. No command output, present or future, can fall through unprojected.
+func ProjectBySchema(data interface{}, props *schema.OrderedProps, full bool) interface{} {
+	if full || props == nil {
+		return data
+	}
+	return projectCanonical(canonicalize(data), props)
+}
+
+// projectCanonical projects already-canonical JSON data. props==nil is a kept
+// leaf with no child schema: pass its value through verbatim.
+func projectCanonical(data interface{}, props *schema.OrderedProps) interface{} {
+	if props == nil {
+		return data
+	}
+	switch v := data.(type) {
+	case map[string]interface{}:
+		out := map[string]interface{}{}
+		for _, key := range props.Order {
+			p := props.Map[key]
+			if !p.Projected {
+				continue
+			}
+			if val, ok := v[key]; ok {
+				out[key] = projectCanonical(val, childProps(p))
+			}
+		}
+		return out
+	case []interface{}:
+		out := make([]interface{}, len(v))
+		for i := range v {
+			out[i] = projectCanonical(v[i], props)
+		}
+		return out
+	default:
+		// Canonical scalar (string / float64 / bool / nil): a leaf value, kept verbatim.
+		return data
+	}
+}
+
+// canonicalize converts any JSON-serializable value to canonical JSON values
+// (map[string]interface{} / []interface{} / scalars) via a marshal round-trip,
+// decoupling projection from a command's concrete Go types. Fail-open: input
+// that does not serialize (never the case for command output) is returned as-is.
+func canonicalize(data interface{}) interface{} {
+	b, err := json.Marshal(data)
+	if err != nil {
+		return data
+	}
+	var out interface{}
+	if err := json.Unmarshal(b, &out); err != nil {
+		return data
+	}
+	return out
+}
+
+// childProps returns the schema to recurse with for a field's value. Array
+// fields keep their element schema in Items.Properties; object fields use
+// Properties directly. Without this, an array-typed field would recurse with
+// nil props and pass its elements through unprojected.
+func childProps(p schema.Property) *schema.OrderedProps {
+	if p.Items != nil && p.Items.Properties != nil {
+		return p.Items.Properties
+	}
+	return p.Properties
+}
+
+// droppedFieldNames returns the set of field names that projection removes from
+// data under props (present in data but not declared projected, at any depth).
+//
+// Unlike a static schema scan, it diffs the actual response against the schema:
+// with positive polarity the hidden fields are simply absent from the
+// OutputSchema (not marked "false"), so the only way to name a trimmed field is
+// to see it in the real data and find it missing from the projected set. Drives
+// the on-demand jq-miss hint. Names only (no values) — never echoes user input
+// or upstream data.
+func droppedFieldNames(data interface{}, props *schema.OrderedProps) map[string]bool {
+	out := map[string]bool{}
+	var walk func(d interface{}, p *schema.OrderedProps)
+	walk = func(d interface{}, p *schema.OrderedProps) {
+		switch v := d.(type) {
+		case map[string]interface{}:
+			for key := range v {
+				var pr schema.Property
+				ok := false
+				if p != nil {
+					pr, ok = p.Map[key]
+				}
+				if !ok || !pr.Projected {
+					out[key] = true
+					continue
+				}
+				// Kept field: recurse only when it has a child schema (object /
+				// array element); a projected leaf keeps its whole value, so
+				// nothing inside it is dropped.
+				if cp := childProps(pr); cp != nil {
+					walk(v[key], cp)
+				}
+			}
+		case []interface{}:
+			for _, e := range v {
+				walk(e, p)
+			}
+		}
+	}
+	walk(canonicalize(data), props) // canonical input → the two-case walk is complete
+	return out
+}
+
+// anyProjected reports whether any field in the tree carries Projected==true.
+// Used as a guard: a Projectable command whose OutputSchema marks nothing is
+// treated as pass-through rather than trimming everything away.
+func anyProjected(props *schema.OrderedProps) bool {
+	if props == nil {
+		return false
+	}
+	for _, key := range props.Order {
+		p := props.Map[key]
+		if p.Projected {
+			return true
+		}
+		if anyProjected(p.Properties) {
+			return true
+		}
+	}
+	return false
+}
+
+// ── OutputSchema builders ──
+//
+// These let a shortcut declare its OutputSchema inline in Go, shaped to match
+// the data it emits. A field declared here shows in the default (projected)
+// view; anything not declared is hidden until --full.
+
+// KeepFields returns an OrderedProps with each name marked projected as a leaf
+// field — the common case for a flat group of scalar fields kept by default.
+func KeepFields(names ...string) *schema.OrderedProps {
+	props := &schema.OrderedProps{}
+	for _, n := range names {
+		props.Set(n, schema.Property{Projected: true})
+	}
+	return props
+}
+
+// ArrayOf returns a projected array-typed property whose elements are projected
+// by elem. Use for a default-shown list field: root.Set("chats", ArrayOf(chat)).
+func ArrayOf(elem *schema.OrderedProps) schema.Property {
+	return schema.Property{Projected: true, Items: &schema.Property{Properties: elem}}
+}
+
+// ObjectOf returns a projected nested-object property whose sub-fields are
+// projected by child. Use for a default-shown object field.
+func ObjectOf(child *schema.OrderedProps) schema.Property {
+	return schema.Property{Projected: true, Properties: child}
+}
diff --git a/shortcuts/common/projection_test.go b/shortcuts/common/projection_test.go
new file mode 100644
index 000000000..a9bc45dd5
--- /dev/null
+++ b/shortcuts/common/projection_test.go
@@ -0,0 +1,374 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package common
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/larksuite/cli/internal/schema"
+)
+
+func props(marked ...string) *schema.OrderedProps {
+	op := &schema.OrderedProps{}
+	set := map[string]bool{}
+	for _, m := range marked {
+		set[m] = true
+	}
+	for _, k := range []string{"name", "avatar", "tenant_key"} {
+		op.Set(k, schema.Property{Type: "string", Projected: set[k]})
+	}
+	return op
+}
+
+func TestProjectBySchema_PositivePolarity(t *testing.T) {
+	in := map[string]interface{}{"name": "g", "avatar": "u", "tenant_key": "t"}
+	out := ProjectBySchema(in, props("name"), false)
+	want := map[string]interface{}{"name": "g"}
+	if !reflect.DeepEqual(out, want) {
+		t.Fatalf("got %v want %v", out, want)
+	}
+	if len(in) != 3 {
+		t.Fatalf("input map mutated: %v", in)
+	}
+}
+
+func TestProjectBySchema_FailOpen(t *testing.T) {
+	in := map[string]interface{}{"name": "g", "avatar": "u"}
+	if got := ProjectBySchema(in, props("name"), true); !reflect.DeepEqual(got, in) {
+		t.Fatalf("full=true should passthrough, got %v", got)
+	}
+	if got := ProjectBySchema(in, nil, false); !reflect.DeepEqual(got, in) {
+		t.Fatalf("nil props should passthrough, got %v", got)
+	}
+	if got := ProjectBySchema("scalar", props("name"), false); got != "scalar" {
+		t.Fatalf("non-map should passthrough, got %v", got)
+	}
+}
+
+func TestProjectBySchema_Array(t *testing.T) {
+	in := []interface{}{
+		map[string]interface{}{"name": "a", "avatar": "x"},
+		map[string]interface{}{"name": "b", "avatar": "y"},
+	}
+	out := ProjectBySchema(in, props("name"), false).([]interface{})
+	for i, it := range out {
+		m := it.(map[string]interface{})
+		if _, ok := m["avatar"]; ok {
+			t.Fatalf("elem %d kept avatar", i)
+		}
+		if m["name"] == nil {
+			t.Fatalf("elem %d dropped projected name", i)
+		}
+	}
+	// original input slice must be untouched (no in-place mutation)
+	for i, it := range in {
+		m := it.(map[string]interface{})
+		if _, ok := m["avatar"]; !ok {
+			t.Fatalf("input elem %d was mutated (avatar removed)", i)
+		}
+	}
+}
+
+func TestProjectBySchema_Nested(t *testing.T) {
+	child := &schema.OrderedProps{}
+	child.Set("chat_id", schema.Property{Type: "string", Projected: true})
+	child.Set("avatar", schema.Property{Type: "string"})
+	root := &schema.OrderedProps{}
+	root.Set("detail", schema.Property{Type: "object", Projected: true, Properties: child})
+
+	in := map[string]interface{}{"detail": map[string]interface{}{"chat_id": "oc", "avatar": "u"}}
+	out := ProjectBySchema(in, root, false).(map[string]interface{})
+	d := out["detail"].(map[string]interface{})
+	if _, ok := d["avatar"]; ok {
+		t.Fatalf("nested avatar should be dropped")
+	}
+	if d["chat_id"] != "oc" {
+		t.Fatalf("nested chat_id should be kept")
+	}
+}
+
+func TestProjectBySchema_ArrayFieldInMap(t *testing.T) {
+	// Mirrors the real list shape: data = {chats: [ {chat_id, avatar}, ... ], page_token}.
+	// The element schema lives in the "chats" field's Items.Properties.
+	elem := &schema.OrderedProps{}
+	elem.Set("chat_id", schema.Property{Type: "string", Projected: true})
+	elem.Set("avatar", schema.Property{Type: "string"}) // full-only
+	root := &schema.OrderedProps{}
+	root.Set("chats", schema.Property{
+		Type:      "array",
+		Projected: true,
+		Items:     &schema.Property{Type: "object", Properties: elem},
+	})
+	root.Set("page_token", schema.Property{Type: "string", Projected: true})
+	root.Set("has_more", schema.Property{Type: "boolean"}) // unmarked → dropped
+
+	in := map[string]interface{}{
+		"chats":      []interface{}{map[string]interface{}{"chat_id": "oc", "avatar": "u"}},
+		"page_token": "pt",
+		"has_more":   true,
+	}
+	out := ProjectBySchema(in, root, false).(map[string]interface{})
+	if out["page_token"] != "pt" {
+		t.Fatalf("projected pagination field page_token should survive")
+	}
+	if _, ok := out["has_more"]; ok {
+		t.Fatalf("unmarked has_more should be dropped")
+	}
+	chats := out["chats"].([]interface{})
+	c0 := chats[0].(map[string]interface{})
+	if c0["chat_id"] != "oc" {
+		t.Fatalf("element projected field chat_id should survive")
+	}
+	if _, ok := c0["avatar"]; ok {
+		t.Fatalf("element full-only avatar should be dropped (array element must be projected via Items.Properties)")
+	}
+}
+
+func TestProjectBySchema_MissingFieldSkipped(t *testing.T) {
+	in := map[string]interface{}{"name": "g"} // avatar missing
+	out := ProjectBySchema(in, props("name", "avatar"), false).(map[string]interface{})
+	if _, ok := out["avatar"]; ok {
+		t.Fatalf("missing field should not be added as null")
+	}
+}
+
+func TestDroppedFieldNames(t *testing.T) {
+	// props("name") declares only "name" projected; avatar/tenant_key are absent
+	// from the schema (positive polarity), so the engine trims them. droppedFieldNames
+	// must find them by diffing the real data against the schema.
+	op := props("name")
+	data := map[string]interface{}{"name": "g", "avatar": "x", "tenant_key": "t"}
+	got := droppedFieldNames(data, op)
+
+	if !got["avatar"] || !got["tenant_key"] {
+		t.Errorf("avatar/tenant_key should be reported dropped, got %v", got)
+	}
+	if got["name"] {
+		t.Error("projected field name must not be reported dropped")
+	}
+}
+
+func TestDroppedFieldNames_Nested(t *testing.T) {
+	// root keeps "detail" (object) with only "chat_id" projected; the response's
+	// detail.avatar and root-level total are not declared, so both are dropped.
+	child := &schema.OrderedProps{}
+	child.Set("chat_id", schema.Property{Type: "string", Projected: true})
+	root := &schema.OrderedProps{}
+	root.Set("detail", schema.Property{Type: "object", Projected: true, Properties: child})
+
+	data := map[string]interface{}{
+		"detail": map[string]interface{}{"chat_id": "oc_1", "avatar": "x"},
+		"total":  5,
+	}
+	got := droppedFieldNames(data, root)
+
+	if !got["avatar"] {
+		t.Error("nested detail.avatar should be reported dropped")
+	}
+	if !got["total"] {
+		t.Error("undeclared root-level total should be reported dropped")
+	}
+	if got["detail"] || got["chat_id"] {
+		t.Errorf("projected detail/chat_id must not be dropped, got %v", got)
+	}
+}
+
+func TestAnyProjected(t *testing.T) {
+	none := &schema.OrderedProps{}
+	none.Set("a", schema.Property{})
+	if anyProjected(none) {
+		t.Fatalf("no marks should report false")
+	}
+	some := &schema.OrderedProps{}
+	some.Set("a", schema.Property{})
+	some.Set("b", schema.Property{Projected: true})
+	if !anyProjected(some) {
+		t.Fatalf("a mark should report true")
+	}
+	child := &schema.OrderedProps{}
+	child.Set("c", schema.Property{Projected: true})
+	nested := &schema.OrderedProps{}
+	nested.Set("obj", schema.Property{Type: "object", Properties: child})
+	if !anyProjected(nested) {
+		t.Fatalf("nested mark should report true")
+	}
+	if anyProjected(nil) {
+		t.Fatalf("nil should report false")
+	}
+}
+
+// ── OutputSchema builder tests ──
+
+// TestKeepFields verifies KeepFields marks every named field projected, as a
+// leaf (no Items/Properties), preserving declaration order.
+func TestKeepFields(t *testing.T) {
+	op := KeepFields("chat_id", "name", "owner_id")
+	if want := []string{"chat_id", "name", "owner_id"}; !reflect.DeepEqual(op.Order, want) {
+		t.Fatalf("Order = %v, want %v", op.Order, want)
+	}
+	for _, k := range op.Order {
+		p := op.Map[k]
+		if !p.Projected {
+			t.Errorf("field %q should be projected", k)
+		}
+		if p.Items != nil || p.Properties != nil {
+			t.Errorf("field %q should be a leaf (no Items/Properties)", k)
+		}
+	}
+	if len(KeepFields().Order) != 0 {
+		t.Fatalf("KeepFields() with no names should yield empty props")
+	}
+}
+
+// TestArrayOf verifies ArrayOf returns a projected property whose elements are
+// projected by the supplied element schema (carried in Items.Properties), and
+// that childProps recurses into that element schema.
+func TestArrayOf(t *testing.T) {
+	elem := KeepFields("chat_id", "name")
+	p := ArrayOf(elem)
+	if !p.Projected {
+		t.Fatalf("ArrayOf should mark the array field projected")
+	}
+	if p.Items == nil || p.Items.Properties != elem {
+		t.Fatalf("ArrayOf should carry the element schema in Items.Properties")
+	}
+	if childProps(p) != elem {
+		t.Fatalf("childProps should recurse into the array element schema")
+	}
+}
+
+// TestObjectOf verifies ObjectOf returns a projected object property whose
+// sub-fields are projected by the supplied child schema (carried in Properties),
+// and that childProps recurses into that child schema.
+func TestObjectOf(t *testing.T) {
+	child := KeepFields("chat_id", "chat_mode")
+	p := ObjectOf(child)
+	if !p.Projected {
+		t.Fatalf("ObjectOf should mark the object field projected")
+	}
+	if p.Properties != child {
+		t.Fatalf("ObjectOf should carry the child schema in Properties")
+	}
+	if p.Items != nil {
+		t.Fatalf("ObjectOf should not set Items")
+	}
+	if childProps(p) != child {
+		t.Fatalf("childProps should recurse into the object child schema")
+	}
+}
+
+// chatListShapeSchema mirrors the +chat-list OutputSchema built with the
+// KeepFields/ArrayOf builders: root marks pagination + the chats wrapper; each
+// chat keeps a curated field set while avatar stays full-only.
+func chatListShapeSchema() *schema.OrderedProps {
+	chat := KeepFields("chat_id", "name", "owner_id")
+	root := KeepFields("has_more", "page_token")
+	root.Set("chats", ArrayOf(chat))
+	return root
+}
+
+// TestProjectBySchema_ChatListShape is the integration check the task asks for:
+// against a chat-list-shaped map, projected fields (wrapper, pagination, the
+// curated chat fields) survive, unmarked fields (top-level total, per-chat
+// avatar) are trimmed, and --full passes the whole envelope through verbatim.
+func TestProjectBySchema_ChatListShape(t *testing.T) {
+	envelope := func() map[string]interface{} {
+		return map[string]interface{}{
+			"chats": []interface{}{
+				map[string]interface{}{
+					"chat_id":  "oc_1",
+					"name":     "Team",
+					"owner_id": "ou_owner",
+					"avatar":   "http://img/1.png", // full-only
+				},
+			},
+			"has_more":   true,
+			"page_token": "pt_next",
+			"total":      1, // unmarked top-level key → trimmed by default
+		}
+	}
+
+	// Default (projected) view.
+	out := ProjectBySchema(envelope(), chatListShapeSchema(), false).(map[string]interface{})
+	if out["has_more"] != true || out["page_token"] != "pt_next" {
+		t.Fatalf("projected pagination fields should survive, got %v", out)
+	}
+	if _, ok := out["total"]; ok {
+		t.Fatalf("unmarked top-level total should be trimmed")
+	}
+	chats := out["chats"].([]interface{})
+	c0 := chats[0].(map[string]interface{})
+	for _, k := range []string{"chat_id", "name", "owner_id"} {
+		if _, ok := c0[k]; !ok {
+			t.Fatalf("projected chat field %q should survive", k)
+		}
+	}
+	if _, ok := c0["avatar"]; ok {
+		t.Fatalf("full-only chat field avatar should be trimmed by default")
+	}
+
+	// --full passthrough: identical to the untouched envelope.
+	full := ProjectBySchema(envelope(), chatListShapeSchema(), true)
+	if !reflect.DeepEqual(full, envelope()) {
+		t.Fatalf("--full should pass the whole envelope through verbatim, got %v", full)
+	}
+}
+
+// TestProjectBySchema_TypedMapSlice guards the []map[string]interface{} case:
+// +chat-list re-collects API items into a typed []map[string]interface{} (not
+// []interface{}). Before the fix that slice fell through to the default branch
+// and was returned unprojected — avatar/tenant_key leaked into the default view.
+// Regression test for that real E2E failure.
+func TestProjectBySchema_TypedMapSlice(t *testing.T) {
+	envelope := map[string]interface{}{
+		"chats": []map[string]interface{}{ // typed slice, NOT []interface{}
+			{"chat_id": "oc_1", "name": "Team", "owner_id": "ou_o", "avatar": "http://img"},
+		},
+		"has_more": true,
+	}
+	out := ProjectBySchema(envelope, chatListShapeSchema(), false).(map[string]interface{})
+	chats, ok := out["chats"].([]interface{})
+	if !ok {
+		t.Fatalf("typed []map slice should be recursed into []interface{}, got %T", out["chats"])
+	}
+	c0 := chats[0].(map[string]interface{})
+	if _, ok := c0["avatar"]; ok {
+		t.Fatalf("full-only avatar must be trimmed from a []map[string]interface{} element, got %v", c0)
+	}
+	if c0["chat_id"] != "oc_1" || c0["name"] != "Team" {
+		t.Fatalf("projected fields must survive, got %v", c0)
+	}
+}
+
+// TestProjectBySchema_AnyGoType is the robustness proof: a command may emit any
+// JSON-serializable Go type — here a []struct, a shape the engine never special-
+// cases. Normalization collapses it to canonical JSON, so projection still trims
+// it. This is what makes the engine immune to "the next weird box".
+func TestProjectBySchema_AnyGoType(t *testing.T) {
+	type chatStruct struct {
+		ChatID string `json:"chat_id"`
+		Name   string `json:"name"`
+		Avatar string `json:"avatar"` // not declared projected → must be trimmed
+	}
+	root := KeepFields("has_more")
+	root.Set("chats", ArrayOf(KeepFields("chat_id", "name")))
+
+	data := map[string]interface{}{
+		"has_more": true,
+		"chats":    []chatStruct{{ChatID: "oc_1", Name: "Team", Avatar: "http://img"}},
+	}
+	out := ProjectBySchema(data, root, false).(map[string]interface{})
+	chats, ok := out["chats"].([]interface{})
+	if !ok {
+		t.Fatalf("a []struct must normalize + recurse into []interface{}, got %T", out["chats"])
+	}
+	c0 := chats[0].(map[string]interface{})
+	if _, ok := c0["avatar"]; ok {
+		t.Fatalf("avatar must be trimmed even from a []struct, got %v", c0)
+	}
+	if c0["chat_id"] != "oc_1" || c0["name"] != "Team" {
+		t.Fatalf("projected fields must survive, got %v", c0)
+	}
+}
diff --git a/shortcuts/common/runner.go b/shortcuts/common/runner.go
index f375714c0..cef606844 100644
--- a/shortcuts/common/runner.go
+++ b/shortcuts/common/runner.go
@@ -12,6 +12,7 @@ import (
 	"net/http"
 	"os"
 	"slices"
+	"sort"
 	"strings"
 	"sync"
 
@@ -30,6 +31,7 @@ import (
 	"github.com/larksuite/cli/internal/errclass"
 	"github.com/larksuite/cli/internal/i18n"
 	"github.com/larksuite/cli/internal/output"
+	"github.com/larksuite/cli/internal/schema"
 	"github.com/spf13/cobra"
 	"github.com/spf13/pflag"
 )
@@ -50,6 +52,8 @@ type RuntimeContext struct {
 	botInfoFunc   func() (*BotInfo, error)          // sync.OnceValues; lazy bot identity from /bot/v3/info
 	larkSDK       *lark.Client                      // eagerly initialized in mountDeclarative
 	stdinConsumed bool                              // set when an Input flag has consumed stdin (`-`); guards against a second flag also using `-` within the same call
+	projectable   bool                              // set when Shortcut.Projectable is true
+	outputProps   *schema.OrderedProps              // command OutputSchema props when it marks fields; nil = pass-through
 }
 
 // ── Identity ──
@@ -694,19 +698,49 @@ func (ctx *RuntimeContext) emit(data interface{}, meta *output.Meta, raw, ok boo
 		return
 	}
 
+	var droppedNames map[string]bool
+	if ctx.projectable && ctx.outputProps != nil {
+		if !ctx.Bool("full") {
+			// Capture what projection trims from the real response (before the
+			// reassign below) so the jq-miss hint can name the specific field.
+			droppedNames = droppedFieldNames(data, ctx.outputProps)
+		}
+		data = ProjectBySchema(data, ctx.outputProps, ctx.Bool("full"))
+	}
+
 	env := output.Envelope{OK: ok, Identity: string(ctx.As()), Data: data, Meta: meta, Notice: output.GetNotice()}
 	if scanResult.Alert != nil {
 		env.ContentSafetyAlert = scanResult.Alert
 	}
 
 	if ctx.JqExpr != "" {
-		filter := output.JqFilter
+		var err error
 		if raw {
-			filter = output.JqFilterRaw
+			_, err = output.JqFilterRawCount(ctx.IO().Out, env, ctx.JqExpr)
+		} else {
+			_, err = output.JqFilterCount(ctx.IO().Out, env, ctx.JqExpr)
 		}
-		if err := filter(ctx.IO().Out, env, ctx.JqExpr); err != nil {
+		if err != nil {
 			fmt.Fprintf(ctx.IO().ErrOut, "error: %v\n", err)
 			ctx.outputErrOnce.Do(func() { ctx.outputErr = err })
+			return
+		}
+		// Fire whenever the agent's jq references a field projection dropped —
+		// regardless of result count. A jq path to a trimmed field yields null
+		// (one result), not an empty result, so a count==0 gate would miss it.
+		if len(droppedNames) > 0 {
+			keys := make([]string, 0, len(droppedNames))
+			for n := range droppedNames {
+				keys = append(keys, n)
+			}
+			sort.Strings(keys) // deterministic
+			for _, name := range keys {
+				if strings.Contains(ctx.JqExpr, name) {
+					fmt.Fprintf(ctx.IO().ErrOut,
+						"note: field `%s` exists but is full-only in this command; re-run with --full (or --full --jq <path> for just that field)\n", name)
+					break
+				}
+			}
 		}
 		return
 	}
@@ -778,6 +812,11 @@ func (ctx *RuntimeContext) outFormat(data interface{}, meta *output.Meta, pretty
 		if !formatOK {
 			fmt.Fprintf(ctx.IO().ErrOut, "warning: unknown format %q, falling back to json\n", ctx.Format)
 		}
+		// Projection applies to non-JSON formats too, so pretty/table/csv match
+		// --json (all formats show the same curated view; --full returns all).
+		if ctx.projectable && ctx.outputProps != nil {
+			data = ProjectBySchema(data, ctx.outputProps, ctx.Bool("full"))
+		}
 		output.FormatValue(ctx.IO().Out, data, format)
 	}
 }
@@ -943,6 +982,15 @@ func runShortcut(cmd *cobra.Command, f *cmdutil.Factory, s *Shortcut, botOnly bo
 	if err := output.ValidateJqFlags(rctx.JqExpr, "", rctx.Format); err != nil {
 		return err
 	}
+	if s.Projectable {
+		rctx.projectable = true
+		if anyProjected(s.OutputSchema) {
+			rctx.outputProps = s.OutputSchema
+		}
+	}
+	if s.NoFullViewHint != "" && rctx.Bool("full") {
+		fmt.Fprintln(rctx.IO().ErrOut, s.NoFullViewHint)
+	}
 	if s.Validate != nil {
 		if err := s.Validate(rctx.ctx, rctx); err != nil {
 			return err
@@ -1238,6 +1286,15 @@ func registerShortcutFlagsWithContext(ctx context.Context, cmd *cobra.Command, f
 			cmd.Flags().String("flag-name", "", "flag whose schema to print (omit to list introspectable flags); used with --print-schema")
 		}
 	}
+	if s.Projectable && cmd.Flags().Lookup("full") == nil {
+		cmd.Flags().Bool("full", false,
+			"return the complete upstream payload instead of the schema-curated default view; "+
+				"to fetch one hidden field, prefer --jq <path> (--full returns everything)")
+	}
+	if s.NoFullViewHint != "" && cmd.Flags().Lookup("full") == nil {
+		cmd.Flags().Bool("full", false, "(this command has no full view — see the note printed when used)")
+		_ = cmd.Flags().MarkHidden("full")
+	}
 	cmd.Flags().StringP("jq", "q", "", "jq expression to filter JSON output")
 	cmdutil.AddShortcutIdentityFlag(ctx, cmd, f, s.AuthTypes)
 }
diff --git a/shortcuts/common/types.go b/shortcuts/common/types.go
index afc4f1a82..46ca92ae1 100644
--- a/shortcuts/common/types.go
+++ b/shortcuts/common/types.go
@@ -6,6 +6,7 @@ package common
 import (
 	"context"
 
+	"github.com/larksuite/cli/internal/schema"
 	"github.com/spf13/cobra"
 )
 
@@ -53,6 +54,20 @@ type Shortcut struct {
 	Tips      []string // optional tips shown in --help output
 	Hidden    bool     // hide from --help / tab completion (still executable); use when deprecating a command in favor of a replacement
 
+	// Projectable opts the command into framework output projection: the framework
+	// auto-injects a --full flag and, after Execute, trims the envelope data by the
+	// command's OutputSchema. No-op/fail-open when OutputSchema is nil or marks nothing.
+	Projectable bool
+	// OutputSchema describes the data this command emits, with projected marks
+	// selecting the default view (build it with KeepFields/ArrayOf/ObjectOf). Consulted
+	// only when Projectable is true; lives on the command, no registry dependency.
+	OutputSchema *schema.OrderedProps
+	// NoFullViewHint, when non-empty, registers a hidden --full flag for a command
+	// that has no full view (e.g. message commands whose output is already a curated
+	// layer). Passing --full prints this redirect to stderr and otherwise runs
+	// normally — turning a flailing "unknown flag" retry into one clear path.
+	NoFullViewHint string
+
 	// Business logic hooks.
 	DryRun   func(ctx context.Context, runtime *RuntimeContext) *DryRunAPI // optional: framework prints & returns when --dry-run is set
 	Validate func(ctx context.Context, runtime *RuntimeContext) error      // optional pre-execution validation
diff --git a/shortcuts/im/convert_lib/content_convert.go b/shortcuts/im/convert_lib/content_convert.go
index 1292b7d33..665af534a 100644
--- a/shortcuts/im/convert_lib/content_convert.go
+++ b/shortcuts/im/convert_lib/content_convert.go
@@ -180,7 +180,7 @@ func formatMessageItem(m map[string]interface{}, runtime *common.RuntimeContext,
 		"message_id":  messageId,
 		"msg_type":    msgType,
 		"content":     content,
-		"sender":      m["sender"],
+		"sender":      projectSender(m["sender"]),
 		"create_time": common.FormatTime(m["create_time"]),
 		"deleted":     deleted,
 		"updated":     updated,
@@ -417,6 +417,22 @@ func extractMentionOpenId(id interface{}) string {
 	return ""
 }
 
+// projectSender tightens the message sender to {id, sender_type, name}. It keeps
+// sender_type (real signal: user vs app coexist) and drops the constant id_type
+// (always open_id) and tenant_key (constant within a tenant). name is injected
+// later by the contact-name resolver.
+func projectSender(v interface{}) interface{} {
+	s, ok := v.(map[string]interface{})
+	if !ok {
+		return v
+	}
+	out := map[string]interface{}{"id": s["id"]}
+	if st, ok := s["sender_type"]; ok {
+		out["sender_type"] = st
+	}
+	return out
+}
+
 // TruncateContent truncates a string for table display.
 func TruncateContent(s string, max int) string {
 	s = strings.ReplaceAll(s, "\n", " ")
diff --git a/shortcuts/im/convert_lib/helpers.go b/shortcuts/im/convert_lib/helpers.go
index a9cec1d74..10a347324 100644
--- a/shortcuts/im/convert_lib/helpers.go
+++ b/shortcuts/im/convert_lib/helpers.go
@@ -113,25 +113,10 @@ func ResolveSenderNames(runtime *common.RuntimeContext, messages []map[string]in
 		}
 	}
 
-	// Collect sender IDs still missing a name
-	seen := make(map[string]bool)
-	var missingIDs []string
-	for _, msg := range messages {
-		sender, ok := msg["sender"].(map[string]interface{})
-		if !ok {
-			continue
-		}
-		senderType, _ := sender["sender_type"].(string)
-		if senderType != "user" {
-			continue
-		}
-		id, _ := sender["id"].(string)
-		if id == "" || !strings.HasPrefix(id, "ou_") || seen[id] || nameMap[id] != "" {
-			continue
-		}
-		seen[id] = true
-		missingIDs = append(missingIDs, id)
-	}
+	// Collect sender IDs still missing a name, identified by ou_ prefix.
+	// Decoupled from sender_type: projectSender runs before resolution and strips
+	// noise fields; keying on the ou_ prefix is order-independent and robust.
+	missingIDs := unresolvedUserSenderIDs(messages, nameMap)
 	if len(missingIDs) == 0 {
 		return nameMap
 	}
@@ -215,6 +200,24 @@ func batchResolveUsers(runtime *common.RuntimeContext, missingIDs []string, name
 	}
 }
 
+// unresolvedUserSenderIDs collects distinct ou_-prefixed (user) sender ids that
+// still need a name. Decoupled from sender_type on purpose: tightening runs
+// before resolution, so keying on the ou_ prefix is order-independent and robust.
+func unresolvedUserSenderIDs(messages []map[string]interface{}, nameMap map[string]string) []string {
+	var ids []string
+	seen := map[string]bool{}
+	for _, msg := range messages {
+		s, _ := msg["sender"].(map[string]interface{})
+		id, _ := s["id"].(string)
+		if id == "" || !strings.HasPrefix(id, "ou_") || seen[id] || nameMap[id] != "" {
+			continue
+		}
+		seen[id] = true
+		ids = append(ids, id)
+	}
+	return ids
+}
+
 // AttachSenderNames enriches message sender objects with resolved display names.
 // Senders whose name could not be resolved are left unchanged (id is preserved).
 func AttachSenderNames(messages []map[string]interface{}, nameMap map[string]string) {
diff --git a/shortcuts/im/im_chat_list.go b/shortcuts/im/im_chat_list.go
index 2ae1ffd46..22ddc231a 100644
--- a/shortcuts/im/im_chat_list.go
+++ b/shortcuts/im/im_chat_list.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/output"
+	"github.com/larksuite/cli/internal/schema"
 	"github.com/larksuite/cli/shortcuts/common"
 )
 
@@ -39,13 +40,15 @@ func writeBotStripP2pWarning(errOut io.Writer) {
 // list groups the current user/bot is a member of. Supports sort order,
 // pagination, and (user identity only) muted-chat filtering via --exclude-muted.
 var ImChatList = common.Shortcut{
-	Service:     "im",
-	Command:     "+chat-list",
-	Description: "List chats the current user/bot is a member of; defaults to groups; pass --types=p2p,group to include p2p single chats (user-only); user/bot; supports sorting, pagination, --exclude-muted (user-only)",
-	Risk:        "read",
-	Scopes:      []string{"im:chat:read"},
-	AuthTypes:   []string{"user", "bot"},
-	HasFormat:   true,
+	Service:      "im",
+	Command:      "+chat-list",
+	Description:  "List chats the current user/bot is a member of; defaults to groups; pass --types=p2p,group to include p2p single chats (user-only); user/bot; supports sorting, pagination, --exclude-muted (user-only)",
+	Risk:         "read",
+	Scopes:       []string{"im:chat:read"},
+	AuthTypes:    []string{"user", "bot"},
+	HasFormat:    true,
+	Projectable:  true,
+	OutputSchema: chatListOutputSchema(),
 	Flags: []common.Flag{
 		{Name: "user-id-type", Default: "open_id", Desc: "ID type for owner_id in response", Enum: []string{"open_id", "union_id", "user_id"}},
 		{Name: "sort", Default: "create_time", Desc: "sort field: create_time (ascending) | active_time (descending)", Enum: []string{"create_time", "active_time"}},
@@ -197,6 +200,20 @@ var ImChatList = common.Shortcut{
 	},
 }
 
+// chatListOutputSchema declares the default (projected) view for +chat-list:
+// the chat object's useful fields + pagination + filter/notices metadata. The
+// chat's avatar / tenant_key / owner_id_type are left unmarked, so they are
+// hidden by default and recoverable via --full (§6.7 initial setting).
+func chatListOutputSchema() *schema.OrderedProps {
+	chat := common.KeepFields(
+		"chat_id", "name", "description", "owner_id", "external",
+		"chat_status", "chat_mode", "p2p_target_type", "p2p_target_id",
+	)
+	root := common.KeepFields("has_more", "page_token", "filter", "notices")
+	root.Set("chats", common.ArrayOf(chat))
+	return root
+}
+
 // normalizeTypes validates and normalizes the --types slice already parsed by cobra.
 // cobra's StringSlice handles the CSV split automatically — both --types=p2p,group
 // and repeated --types p2p --types group arrive here as a 2-element []string,
diff --git a/shortcuts/im/im_chat_messages_list.go b/shortcuts/im/im_chat_messages_list.go
index 471a3fb92..abbd13908 100644
--- a/shortcuts/im/im_chat_messages_list.go
+++ b/shortcuts/im/im_chat_messages_list.go
@@ -17,16 +17,22 @@ import (
 	larkcore "github.com/larksuite/oapi-sdk-go/v3/core"
 )
 
+// imMessageNoFullHint redirects an agent that reflexively passes --full to a
+// message command (which has no full view) to the right path instead of leaving
+// it to flail on an "unknown flag" error.
+const imMessageNoFullHint = "note: messages have no --full view; sender is intentionally minimal ({id, sender_type, name}). Do not retry with --full — for fuller sender details resolve the id via the contact domain (e.g. `lark-cli contact +search-user`, or contact user get)."
+
 var ImChatMessageList = common.Shortcut{
-	Service:     "im",
-	Command:     "+chat-messages-list",
-	Description: "List messages in a chat or P2P conversation; user/bot; accepts --chat-id or --user-id, resolves P2P chat_id, supports time range/sort/pagination",
-	Risk:        "read",
-	Scopes:      []string{"im:message:readonly"},
-	UserScopes:  []string{"im:message.group_msg:get_as_user", "im:message.p2p_msg:get_as_user", "im:message.reactions:read", "contact:user.base:readonly"},
-	BotScopes:   []string{"im:message.group_msg", "im:message.p2p_msg:readonly", "im:message.reactions:read"},
-	AuthTypes:   []string{"user", "bot"},
-	HasFormat:   true,
+	Service:        "im",
+	Command:        "+chat-messages-list",
+	Description:    "List messages in a chat or P2P conversation; user/bot; accepts --chat-id or --user-id, resolves P2P chat_id, supports time range/sort/pagination",
+	Risk:           "read",
+	Scopes:         []string{"im:message:readonly"},
+	UserScopes:     []string{"im:message.group_msg:get_as_user", "im:message.p2p_msg:get_as_user", "im:message.reactions:read", "contact:user.base:readonly"},
+	BotScopes:      []string{"im:message.group_msg", "im:message.p2p_msg:readonly", "im:message.reactions:read"},
+	AuthTypes:      []string{"user", "bot"},
+	HasFormat:      true,
+	NoFullViewHint: imMessageNoFullHint,
 	Flags: []common.Flag{
 		{Name: "chat-id", Desc: "(required, mutually exclusive with --user-id) chat ID (oc_xxx)"},
 		{Name: "user-id", Desc: "(required, mutually exclusive with --chat-id; user identity only) user open_id (ou_xxx)"},
diff --git a/shortcuts/im/im_chat_search.go b/shortcuts/im/im_chat_search.go
index ef46946ec..4ad464925 100644
--- a/shortcuts/im/im_chat_search.go
+++ b/shortcuts/im/im_chat_search.go
@@ -12,6 +12,7 @@ import (
 
 	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/output"
+	"github.com/larksuite/cli/internal/schema"
 	"github.com/larksuite/cli/internal/util"
 	"github.com/larksuite/cli/shortcuts/common"
 )
@@ -21,13 +22,15 @@ import (
 // member/type filters, sort order, pagination, and (user identity only) the
 // --exclude-muted client-side mute filter.
 var ImChatSearch = common.Shortcut{
-	Service:     "im",
-	Command:     "+chat-search",
-	Description: "Search visible group chats by --query keyword and/or --member-ids; user/bot; e.g. look up chat_id by group name; supports type filters, sorting, pagination, and --exclude-muted (user identity only)",
-	Risk:        "read",
-	Scopes:      []string{"im:chat:read"},
-	AuthTypes:   []string{"user", "bot"},
-	HasFormat:   true,
+	Service:      "im",
+	Command:      "+chat-search",
+	Description:  "Search visible group chats by --query keyword and/or --member-ids; user/bot; e.g. look up chat_id by group name; supports type filters, sorting, pagination, and --exclude-muted (user identity only)",
+	Risk:         "read",
+	Scopes:       []string{"im:chat:read"},
+	AuthTypes:    []string{"user", "bot"},
+	HasFormat:    true,
+	Projectable:  true,
+	OutputSchema: chatSearchOutputSchema(),
 	Flags: []common.Flag{
 		{Name: "query", Desc: "search keyword (server may return data.notice for overly long input)"},
 		{Name: "search-types", Desc: "chat types, comma-separated (private, external, public_joined, public_not_joined)"},
@@ -207,6 +210,22 @@ var ImChatSearch = common.Shortcut{
 	},
 }
 
+// chatSearchOutputSchema declares the default (projected) view for +chat-search.
+// Mirrors +chat-list's chat object plus create_time (the search meta_data carries
+// it), and marks the wrapper key (chats), pagination (has_more/page_token), and
+// the total count so they survive trimming. The chat's avatar / tenant_key /
+// owner_id_type stay unmarked → hidden by default, recoverable via --full.
+func chatSearchOutputSchema() *schema.OrderedProps {
+	chat := common.KeepFields(
+		"chat_id", "name", "description", "owner_id", "external",
+		"chat_status", "chat_mode", "p2p_target_type", "p2p_target_id",
+		"create_time",
+	)
+	root := common.KeepFields("has_more", "page_token", "total", "filter")
+	root.Set("chats", common.ArrayOf(chat))
+	return root
+}
+
 // buildSearchChatBody builds the JSON request body for POST /im/v2/chats/search
 // from the runtime flag values. The query string is normalized via
 // normalizeChatSearchQuery (hyphenated terms get quoted). The "filter" object
diff --git a/shortcuts/im/im_feed_group_list.go b/shortcuts/im/im_feed_group_list.go
index c6bfdd0ef..8df1f60db 100644
--- a/shortcuts/im/im_feed_group_list.go
+++ b/shortcuts/im/im_feed_group_list.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/larksuite/cli/errs"
 	"github.com/larksuite/cli/internal/output"
+	"github.com/larksuite/cli/internal/schema"
 	"github.com/larksuite/cli/shortcuts/common"
 	larkcore "github.com/larksuite/oapi-sdk-go/v3/core"
 )
@@ -25,13 +26,15 @@ const feedGroupListPath = "/open-apis/im/v1/groups"
 // which follows only one array field and silently drops the other list's later
 // pages; this shortcut paginates the dual-list response itself.
 var ImFeedGroupList = common.Shortcut{
-	Service:     "im",
-	Command:     "+feed-group-list",
-	Description: "List the caller's feed groups (tags); user-only; supports `--page-all` auto-pagination",
-	Risk:        "read",
-	UserScopes:  []string{feedGroupReadScope},
-	AuthTypes:   []string{"user"},
-	HasFormat:   true,
+	Service:      "im",
+	Command:      "+feed-group-list",
+	Description:  "List the caller's feed groups (tags); user-only; supports `--page-all` auto-pagination",
+	Risk:         "read",
+	UserScopes:   []string{feedGroupReadScope},
+	AuthTypes:    []string{"user"},
+	HasFormat:    true,
+	Projectable:  true,
+	OutputSchema: feedGroupListOutputSchema(),
 	Flags: []common.Flag{
 		{Name: "page-size", Type: "int", Default: "50", Desc: "page size (1-50)"},
 		{Name: "page-token", Desc: "pagination token for next page"},
@@ -71,6 +74,18 @@ var ImFeedGroupList = common.Shortcut{
 	},
 }
 
+// feedGroupListOutputSchema declares the default (projected) view for
+// +feed-group-list. Each group keeps group_id/name/type; its rules stay
+// full-only. Both list wrappers (groups, deleted_groups) and pagination
+// (has_more/page_token) are marked so they survive trimming.
+func feedGroupListOutputSchema() *schema.OrderedProps {
+	group := common.KeepFields("group_id", "name", "type")
+	root := common.KeepFields("has_more", "page_token")
+	root.Set("groups", common.ArrayOf(group))
+	root.Set("deleted_groups", common.ArrayOf(group))
+	return root
+}
+
 func validateFeedGroupListPageOptions(rt *common.RuntimeContext) error {
 	if n := rt.Int("page-size"); n < 1 || n > 50 {
 		return errs.NewValidationError(errs.SubtypeInvalidArgument, "--page-size must be an integer between 1 and 50").WithParam("--page-size")
diff --git a/shortcuts/im/im_feed_shortcut_list.go b/shortcuts/im/im_feed_shortcut_list.go
index 75194c873..6d4a9b406 100644
--- a/shortcuts/im/im_feed_shortcut_list.go
+++ b/shortcuts/im/im_feed_shortcut_list.go
@@ -7,6 +7,7 @@ import (
 	"context"
 	"fmt"
 
+	"github.com/larksuite/cli/internal/schema"
 	"github.com/larksuite/cli/shortcuts/common"
 	larkcore "github.com/larksuite/oapi-sdk-go/v3/core"
 )
@@ -30,6 +31,8 @@ var ImFeedShortcutList = common.Shortcut{
 	ConditionalUserScopes: []string{chatBatchQueryScope},
 	AuthTypes:             []string{"user"},
 	HasFormat:             true,
+	Projectable:           true,
+	OutputSchema:          feedShortcutListOutputSchema(),
 	Flags: []common.Flag{
 		{Name: "page-token",
 			Desc: "opaque pagination token from the previous response; omit for the first page. If a token is rejected because the list changed, restart by omitting it."},
@@ -69,6 +72,24 @@ var ImFeedShortcutList = common.Shortcut{
 	},
 }
 
+// feedShortcutListOutputSchema declares the default (projected) view for
+// +feed-shortcut-list. Each entry keeps feed_card_id + type, and the enriched
+// `detail` (full chat object from im.chats.batch_query) is narrowed to
+// chat_id/name/chat_mode — its avatar / tenant_key / owner_id* / description /
+// external stay full-only. The wrapper key (shortcuts), pagination
+// (has_more/page_token), and the data-level _notice the command may emit on
+// enrichment failure are all marked so they survive trimming.
+func feedShortcutListOutputSchema() *schema.OrderedProps {
+	detail := common.KeepFields("chat_id", "name", "chat_mode")
+
+	item := common.KeepFields("feed_card_id", "type")
+	item.Set("detail", common.ObjectOf(detail))
+
+	root := common.KeepFields("has_more", "page_token", "_notice")
+	root.Set("shortcuts", common.ArrayOf(item))
+	return root
+}
+
 // feedShortcutListQuery omits the page_token key entirely when the token is
 // empty, so the server treats the call as a first-page request.
 func feedShortcutListQuery(token string) larkcore.QueryParams {
diff --git a/shortcuts/im/im_flag_list.go b/shortcuts/im/im_flag_list.go
index d4761e124..3784122db 100644
--- a/shortcuts/im/im_flag_list.go
+++ b/shortcuts/im/im_flag_list.go
@@ -10,6 +10,7 @@ import (
 	"strconv"
 
 	"github.com/larksuite/cli/errs"
+	"github.com/larksuite/cli/internal/schema"
 	"github.com/larksuite/cli/shortcuts/common"
 	larkcore "github.com/larksuite/oapi-sdk-go/v3/core"
 )
@@ -17,13 +18,15 @@ import (
 // ImFlagList provides the +flag-list shortcut for listing bookmarks.
 // Feed-type thread entries are auto-enriched with message content.
 var ImFlagList = common.Shortcut{
-	Service:     "im",
-	Command:     "+flag-list",
-	Description: "List bookmarks; user-only; auto-enriches feed-type thread entries with message content; supports `--page-all` auto-pagination",
-	Risk:        "read",
-	UserScopes:  []string{flagReadScope},
-	AuthTypes:   []string{"user"},
-	HasFormat:   true,
+	Service:      "im",
+	Command:      "+flag-list",
+	Description:  "List bookmarks; user-only; auto-enriches feed-type thread entries with message content; supports `--page-all` auto-pagination",
+	Risk:         "read",
+	UserScopes:   []string{flagReadScope},
+	AuthTypes:    []string{"user"},
+	HasFormat:    true,
+	Projectable:  true,
+	OutputSchema: flagListOutputSchema(),
 	Flags: []common.Flag{
 		{Name: "page-size", Type: "int", Default: "50", Desc: "page size (1-50)"},
 		{Name: "page-token", Desc: "pagination token for next page"},
@@ -70,6 +73,27 @@ var ImFlagList = common.Shortcut{
 	},
 }
 
+// flagListOutputSchema declares the default (projected) view for +flag-list.
+// Each bookmark item keeps its identity/type/timestamps; the enriched feed-thread
+// `message` is narrowed to message_id + msg_type + body.content (the rest of the
+// raw mget message — sender, mentions, chat_id, etc. — stays full-only). The two
+// list wrappers (flag_items, delete_flag_items), the inline messages array, and
+// pagination (has_more/page_token) are all marked so they survive trimming.
+func flagListOutputSchema() *schema.OrderedProps {
+	body := common.KeepFields("content")
+	message := common.KeepFields("message_id", "msg_type")
+	message.Set("body", common.ObjectOf(body))
+
+	item := common.KeepFields("item_id", "flag_type", "item_type", "create_time", "update_time")
+	item.Set("message", common.ObjectOf(message))
+
+	root := common.KeepFields("has_more", "page_token")
+	root.Set("flag_items", common.ArrayOf(item))
+	root.Set("delete_flag_items", common.ArrayOf(item))
+	root.Set("messages", common.ArrayOf(message))
+	return root
+}
+
 func validateListOptions(rt *common.RuntimeContext) error {
 	if n := rt.Int("page-size"); n < 1 || n > 50 {
 		return errs.NewValidationError(errs.SubtypeInvalidArgument, "--page-size must be an integer between 1 and 50").WithParam("--page-size")
diff --git a/shortcuts/im/im_messages_mget.go b/shortcuts/im/im_messages_mget.go
index 931fbba36..7a5bdc7ca 100644
--- a/shortcuts/im/im_messages_mget.go
+++ b/shortcuts/im/im_messages_mget.go
@@ -18,15 +18,16 @@ import (
 const maxMGetMessageIDs = 50
 
 var ImMessagesMGet = common.Shortcut{
-	Service:     "im",
-	Command:     "+messages-mget",
-	Description: "Batch get messages by IDs; user/bot; fetches up to 50 om_ message IDs, formats sender names, expands thread replies",
-	Risk:        "read",
-	Scopes:      []string{"im:message:readonly"},
-	UserScopes:  []string{"im:message.group_msg:get_as_user", "im:message.p2p_msg:get_as_user", "im:message.reactions:read", "contact:user.basic_profile:readonly"},
-	BotScopes:   []string{"im:message.group_msg", "im:message.p2p_msg:readonly", "im:message.reactions:read", "contact:user.base:readonly"},
-	AuthTypes:   []string{"user", "bot"},
-	HasFormat:   true,
+	Service:        "im",
+	Command:        "+messages-mget",
+	Description:    "Batch get messages by IDs; user/bot; fetches up to 50 om_ message IDs, formats sender names, expands thread replies",
+	Risk:           "read",
+	Scopes:         []string{"im:message:readonly"},
+	UserScopes:     []string{"im:message.group_msg:get_as_user", "im:message.p2p_msg:get_as_user", "im:message.reactions:read", "contact:user.basic_profile:readonly"},
+	BotScopes:      []string{"im:message.group_msg", "im:message.p2p_msg:readonly", "im:message.reactions:read", "contact:user.base:readonly"},
+	AuthTypes:      []string{"user", "bot"},
+	HasFormat:      true,
+	NoFullViewHint: imMessageNoFullHint,
 	Flags: []common.Flag{
 		{Name: "message-ids", Desc: "message IDs, comma-separated (om_xxx,om_yyy)", Required: true},
 		{Name: "no-reactions", Type: "bool", Desc: "skip auto-fetching reactions for each message (default: enrichment enabled)"},
diff --git a/shortcuts/im/im_messages_search.go b/shortcuts/im/im_messages_search.go
index 6cffd432e..6a586aa42 100644
--- a/shortcuts/im/im_messages_search.go
+++ b/shortcuts/im/im_messages_search.go
@@ -26,13 +26,14 @@ const (
 )
 
 var ImMessagesSearch = common.Shortcut{
-	Service:     "im",
-	Command:     "+messages-search",
-	Description: "Search messages across chats (supports keyword, sender, time range filters) with user identity; user-only; filters by chat/sender/attachment/time, enriches results via mget and chats batch_query",
-	Risk:        "read",
-	Scopes:      []string{"search:message", "im:message.reactions:read", "contact:user.basic_profile:readonly"},
-	AuthTypes:   []string{"user"},
-	HasFormat:   true,
+	Service:        "im",
+	Command:        "+messages-search",
+	Description:    "Search messages across chats (supports keyword, sender, time range filters) with user identity; user-only; filters by chat/sender/attachment/time, enriches results via mget and chats batch_query",
+	Risk:           "read",
+	Scopes:         []string{"search:message", "im:message.reactions:read", "contact:user.basic_profile:readonly"},
+	AuthTypes:      []string{"user"},
+	HasFormat:      true,
+	NoFullViewHint: imMessageNoFullHint,
 	Flags: []common.Flag{
 		{Name: "query", Desc: "search keyword"},
 		{Name: "chat-id", Desc: "limit to chat IDs, comma-separated"},
diff --git a/shortcuts/im/im_threads_messages_list.go b/shortcuts/im/im_threads_messages_list.go
index 7fc1d524a..18f9610df 100644
--- a/shortcuts/im/im_threads_messages_list.go
+++ b/shortcuts/im/im_threads_messages_list.go
@@ -20,15 +20,16 @@ import (
 const threadsMessagesMaxPageSize = 500
 
 var ImThreadsMessagesList = common.Shortcut{
-	Service:     "im",
-	Command:     "+threads-messages-list",
-	Description: "List messages in a thread; user/bot; accepts om_/omt_ input, resolves message IDs to thread_id, supports sort/pagination",
-	Risk:        "read",
-	Scopes:      []string{"im:message:readonly"},
-	UserScopes:  []string{"im:message.group_msg:get_as_user", "im:message.p2p_msg:get_as_user", "im:message.reactions:read", "contact:user.basic_profile:readonly"},
-	BotScopes:   []string{"im:message.group_msg", "im:message.p2p_msg:readonly", "im:message.reactions:read", "contact:user.base:readonly"},
-	AuthTypes:   []string{"user", "bot"},
-	HasFormat:   true,
+	Service:        "im",
+	Command:        "+threads-messages-list",
+	Description:    "List messages in a thread; user/bot; accepts om_/omt_ input, resolves message IDs to thread_id, supports sort/pagination",
+	Risk:           "read",
+	Scopes:         []string{"im:message:readonly"},
+	UserScopes:     []string{"im:message.group_msg:get_as_user", "im:message.p2p_msg:get_as_user", "im:message.reactions:read", "contact:user.basic_profile:readonly"},
+	BotScopes:      []string{"im:message.group_msg", "im:message.p2p_msg:readonly", "im:message.reactions:read", "contact:user.base:readonly"},
+	AuthTypes:      []string{"user", "bot"},
+	HasFormat:      true,
+	NoFullViewHint: imMessageNoFullHint,
 	Flags: []common.Flag{
 		{Name: "thread", Desc: "thread ID (om_xxx or omt_xxx)", Required: true},
 		{Name: "order", Default: "asc", Desc: "sort order: asc | desc", Enum: []string{"asc", "desc"}},
diff --git a/skills/lark-im/references/lark-im-chat-list.md b/skills/lark-im/references/lark-im-chat-list.md
index 0d6ca2b28..5f604c7b3 100644
--- a/skills/lark-im/references/lark-im-chat-list.md
+++ b/skills/lark-im/references/lark-im-chat-list.md
@@ -71,6 +71,15 @@ lark-cli im +chat-list --as user --types p2p
 | `p2p_target_type` | Peer type, e.g., `user` |
 | `p2p_target_id` | Peer ID (type controlled by `--user-id-type`) |
 
+## Default view and `--full`
+
+Output is a **curated view**: only the fields above. Verbose / low-value fields on each chat (`avatar`, `tenant_key`, `owner_id_type`) are **hidden by default**.
+
+- `--full` returns the complete upstream payload (all hidden fields included).
+- Need one hidden field? Use **`--full --jq <path>`** (e.g. `--full --jq '.data.chats[].avatar'`). The `--full` is required even with `--jq`: `--jq` filters the curated view, where hidden fields are already trimmed away — so a bare `--jq '.data.chats[].avatar'` returns `null` (and stderr prints a `... is full-only ... re-run with --full` note). Pairing `--jq` with `--full` keeps the output to just that field, so you avoid dumping the whole payload back into context.
+- A field missing from the default view does **not** mean it doesn't exist — it may be full-only. Don't conclude "no such field" from its absence here.
+- Don't try `lark-cli schema` to introspect this command (it isn't in the catalog); the field list is in this doc.
+
 ## Including p2p single chats
 
 Default behavior lists groups only — same as before this feature. To include p2p, pass `--types`:
diff --git a/skills/lark-im/references/lark-im-chat-messages-list.md b/skills/lark-im/references/lark-im-chat-messages-list.md
index d0f5af185..d18ad45f1 100644
--- a/skills/lark-im/references/lark-im-chat-messages-list.md
+++ b/skills/lark-im/references/lark-im-chat-messages-list.md
@@ -104,6 +104,8 @@ Each message contains:
 | `mentions` | Array of @mentions in the message; each item contains `{id, key, name}`. Present only when the message contains @mentions |
 | `thread_id` | Thread ID (`omt_xxx`) if the message has replies in a thread. Present only when replies exist |
 
+The `sender` sub-object is **intentionally minimal**: `{id, sender_type, name}`. This command has **no `--full` view** — passing `--full` just prints a one-line note to stderr and outputs normally. For fuller sender details, take `sender.id` to the **contact domain** (e.g. `lark-cli contact +search-user`, or contact user get). Do **not** retry this command with `--full` to expand the sender.
+
 ## Pagination (`has_more` / `page_token`)
 
 `im +chat-messages-list` returns `has_more` and `page_token` when more data is available. Use `--page-token` to continue:
diff --git a/skills/lark-im/references/lark-im-chat-search.md b/skills/lark-im/references/lark-im-chat-search.md
index bdd93c0da..ff620fc97 100644
--- a/skills/lark-im/references/lark-im-chat-search.md
+++ b/skills/lark-im/references/lark-im-chat-search.md
@@ -72,6 +72,15 @@ lark-cli im +chat-search --query "project" --dry-run
 | `external` | Whether the chat is external |
 | `chat_status` | Chat status (`normal` / `dissolved` / `dissolved_save`) |
 
+## Default view and `--full`
+
+Output is a **curated view**: only the fields above (plus `create_time`). Verbose / low-value fields on each chat (`avatar`, `tenant_key`, `owner_id_type`) are **hidden by default**.
+
+- `--full` returns the complete upstream payload (all hidden fields included).
+- Need one hidden field? Use **`--full --jq <path>`** (e.g. `--full --jq '.data.chats[].avatar'`). The `--full` is required even with `--jq`: `--jq` filters the curated view, where hidden fields are already trimmed away — so a bare `--jq '.data.chats[].avatar'` returns `null` (and stderr prints a `... is full-only ... re-run with --full` note). Pairing `--jq` with `--full` keeps the output to just that field, so you avoid dumping the whole payload back into context.
+- A field missing from the default view does **not** mean it doesn't exist — it may be full-only. Don't conclude "no such field" from its absence here.
+- Don't try `lark-cli schema` to introspect this command (it isn't in the catalog); the field list is in this doc.
+
 ## Filtering muted chats
 
 `--exclude-muted` (user identity only) drops chats the current user has set to do-not-disturb. After the search call, the CLI batches the page's chat_ids through `POST /open-apis/im/v1/chat_user_setting/batch_get_mute_status` and filters client-side. Under `--as bot`, the mute API is UAT-only and the filter is silently skipped.
diff --git a/skills/lark-im/references/lark-im-feed-group-list.md b/skills/lark-im/references/lark-im-feed-group-list.md
index bc5aca82a..5a00870d7 100644
--- a/skills/lark-im/references/lark-im-feed-group-list.md
+++ b/skills/lark-im/references/lark-im-feed-group-list.md
@@ -58,6 +58,15 @@ JSON keeps the raw envelope; with `--page-all` both lists are returned fully mer
 
 > `page_size` counts live and deleted groups together, and the per-page count can be smaller still when entries are filtered — so never infer completeness from counts. Pagination is governed solely by `has_more`.
 
+## Default view and `--full`
+
+Output is a **curated view**: each group keeps `group_id`, `name`, and `type`. The `rules` object (shown in the example above) is **hidden by default**.
+
+- `--full` returns the complete upstream payload (`rules` included).
+- Need `rules`? Use **`--full --jq <path>`** (e.g. `--full --jq '.data.groups[].rules'`). The `--full` is required even with `--jq`: `--jq` filters the curated view, where hidden fields are already trimmed away — so a bare `--jq '.data.groups[].rules'` returns `null` (and stderr prints a `... is full-only ... re-run with --full` note). Pairing `--jq` with `--full` keeps the output to just that field, so you avoid dumping the whole payload back into context.
+- A field missing from the default view does **not** mean it doesn't exist — it may be full-only. Don't conclude "no such field" from its absence here.
+- Don't try `lark-cli schema` to introspect this command (it isn't in the catalog); the field list is in this doc.
+
 ## See also
 
 - [lark-im-feed-groups.md](lark-im-feed-groups.md) — raw `feed.groups.*` APIs, enums, and rule guidance
diff --git a/skills/lark-im/references/lark-im-feed-shortcut-list.md b/skills/lark-im/references/lark-im-feed-shortcut-list.md
index 6a22893cd..d9a484a57 100644
--- a/skills/lark-im/references/lark-im-feed-shortcut-list.md
+++ b/skills/lark-im/references/lark-im-feed-shortcut-list.md
@@ -96,6 +96,15 @@ The `detail` payload is dispatched **per `type`**. Today only CHAT is wired in;
 - **P2P chats** return an empty `name` because the Feishu client renders the partner's display name there. The rest of the object (especially `p2p_target_id`) still flows through, so callers can resolve the partner via `+contact-search` if a display title is needed.
 - **Lookup failure** (missing scope, network error) → the list still returns successfully; a warning is printed to stderr, the data payload carries a `_notice` field (`"detail enrichment skipped: ..."`), and affected entries simply lack the `detail` field. Check `_notice` to tell "enrichment skipped" from "nothing to enrich".
 
+## Default view and `--full`
+
+Output is a **curated view**. The `detail` object is narrowed to `chat_id`, `name`, and `chat_mode`; its other chat fields (`avatar`, `tenant_key`, `owner_id*`, `description`, `external`, `p2p_target_*`) shown in the example above are **hidden by default**.
+
+- `--full` returns the complete upstream payload (full `detail` chat objects included).
+- Need one hidden field? Use **`--full --jq <path>`** (e.g. `--full --jq '.data.shortcuts[].detail.p2p_target_id'`). The `--full` is required even with `--jq`: `--jq` filters the curated view, where hidden fields are already trimmed away — so a bare `--jq '.data.shortcuts[].detail.p2p_target_id'` returns `null` (and stderr prints a `... is full-only ... re-run with --full` note). Pairing `--jq` with `--full` keeps the output to just that field, so you avoid dumping the whole payload back into context.
+- A field missing from the default view does **not** mean it doesn't exist — it may be full-only. Don't conclude "no such field" from its absence here.
+- Don't try `lark-cli schema` to introspect this command (it isn't in the catalog); the field list is in this doc.
+
 ## Permissions
 
 - Required scope: `im:feed.shortcut:read`
diff --git a/skills/lark-im/references/lark-im-flag-list.md b/skills/lark-im/references/lark-im-flag-list.md
index 913a89056..edf809ac7 100644
--- a/skills/lark-im/references/lark-im-flag-list.md
+++ b/skills/lark-im/references/lark-im-flag-list.md
@@ -64,6 +64,15 @@ Note: `(thread, feed)` / `(msg_thread, feed)` entries are automatically enriched
 
 - **delete_flag_items are not enriched**: Message content is only fetched for active flags (`flag_items`), not canceled flags (`delete_flag_items`). If you need message content for a canceled flag, query the message separately using `+messages-mget --message-ids <item_id>`.
 
+## Default view and `--full`
+
+Output is a **curated view**. The enriched feed-thread `message` on each item is narrowed to `message_id`, `msg_type`, and `body.content`; the rest of the raw mget message (`sender`, `mentions`, `chat_id`, etc.) is **hidden by default**.
+
+- `--full` returns the complete upstream payload (full message objects included).
+- Need one hidden field? Use **`--full --jq <path>`** (e.g. `--full --jq '.data.flag_items[].message.sender'`). The `--full` is required even with `--jq`: `--jq` filters the curated view, where hidden fields are already trimmed away — so a bare `--jq '.data.flag_items[].message.sender'` returns `null` (and stderr prints a `... is full-only ... re-run with --full` note). Pairing `--jq` with `--full` keeps the output to just that field, so you avoid dumping the whole payload back into context.
+- A field missing from the default view does **not** mean it doesn't exist — it may be full-only. Don't conclude "no such field" from its absence here.
+- Don't try `lark-cli schema` to introspect this command (it isn't in the catalog); the field list is in this doc.
+
 ## Response Example (Sanitized)
 
 ```json
diff --git a/skills/lark-im/references/lark-im-messages-mget.md b/skills/lark-im/references/lark-im-messages-mget.md
index 852efcea1..e73cfd347 100644
--- a/skills/lark-im/references/lark-im-messages-mget.md
+++ b/skills/lark-im/references/lark-im-messages-mget.md
@@ -51,6 +51,8 @@ Each message contains:
 | `sender` | Sender information (includes `name`) |
 | `content` | Message content |
 
+The `sender` sub-object is **intentionally minimal**: `{id, sender_type, name}`. This command has **no `--full` view** — passing `--full` just prints a one-line note to stderr and outputs normally. For fuller sender details, take `sender.id` to the **contact domain** (e.g. `lark-cli contact +search-user`, or contact user get). Do **not** retry this command with `--full` to expand the sender.
+
 ## Usage Scenarios
 
 ### Scenario 1: Fetch the full content of a specific message
diff --git a/skills/lark-im/references/lark-im-messages-search.md b/skills/lark-im/references/lark-im-messages-search.md
index b466d5412..5d617618e 100644
--- a/skills/lark-im/references/lark-im-messages-search.md
+++ b/skills/lark-im/references/lark-im-messages-search.md
@@ -130,6 +130,8 @@ Each message in JSON output contains:
 | `mentions` | Array of @mentions in the message; each item contains `{id, key, name}`. Present only when the message contains @mentions |
 | `thread_id` | Thread ID (`omt_xxx`) if the message has replies in a thread. Present only when replies exist |
 
+The `sender` sub-object is **intentionally minimal**: `{id, sender_type, name}`. This command has **no `--full` view** — passing `--full` just prints a one-line note to stderr and outputs normally. For fuller sender details, take `sender.id` to the **contact domain** (e.g. `lark-cli contact +search-user`, or contact user get). Do **not** retry this command with `--full` to expand the sender.
+
 ### 4. Pagination behavior
 
 - Default behavior is still **single-page**.
diff --git a/skills/lark-im/references/lark-im-threads-messages-list.md b/skills/lark-im/references/lark-im-threads-messages-list.md
index 61c4acec7..62c62d7d7 100644
--- a/skills/lark-im/references/lark-im-threads-messages-list.md
+++ b/skills/lark-im/references/lark-im-threads-messages-list.md
@@ -72,6 +72,10 @@ Thread messages do not support `start_time` / `end_time` filtering because of Fe
 | Read the full thread in chronological order | `--order asc --page-size 50`, then paginate as needed |
 | Just confirm whether replies exist | `--order desc --page-size 1` |
 
+### 5. Sender is minimal; no `--full` view
+
+The `sender` sub-object on each reply is **intentionally minimal**: `{id, sender_type, name}`. This command has **no `--full` view** — passing `--full` just prints a one-line note to stderr and outputs normally. For fuller sender details, take `sender.id` to the **contact domain** (e.g. `lark-cli contact +search-user`, or contact user get). Do **not** retry this command with `--full` to expand the sender.
+
 ## Usage Scenarios
 
 ### Scenario 1: Expand a thread discovered in group messages
diff --git a/skills/lark-shared/SKILL.md b/skills/lark-shared/SKILL.md
index 8b4813ecc..0010621c5 100644
--- a/skills/lark-shared/SKILL.md
+++ b/skills/lark-shared/SKILL.md
@@ -121,6 +121,10 @@ lark-cli 命令执行后，如果检测到新版本，JSON 输出中会包含 `_
 
 **规则**：不要静默忽略更新提示。即使当前任务与更新无关，也应在完成用户请求后补充告知。
 
+## 读命令的精选视图与 `--full`
+
+不少 lark-cli 读命令默认返回**精选视图**，把冗长/低价值字段（如 `avatar`、`tenant_key`）裁掉省上下文——是有意为之，不是字段不存在。需要的字段不在默认输出里时：别据此断言“没这个字段”，也别转头猜别的命令或 meta API——给**同一条命令加 `--full`** 取回完整 payload（只取一个字段就 `--full --jq <path>`）。
+
 ## 安全规则
 
 - **禁止输出密钥**（appSecret、accessToken）到终端明文。