[codex] remediate 0.18 accuracy and warm indexing

[TheGreenCedar]

Closes #2099
Refs #2098

Context

The retained 0.18 product receipt proves a Dart accuracy regression and a 21.692-second Redis one-file refresh. This draft starts from that failed evidence and keeps broad qualification closed until the focused remediation lanes pass.

Base: a41e605
Current head: 4585ebf

What changed

• Added the machine-readable remediation failure ledger.
• Replaced whole-task warm labeling with separate runner, first-packet, continuation, final-packet, and whole-task timing.
• Made reused comparator rows timing-ineligible.
• Added a reconciled incremental wall receipt with scheduled-path reasons and exclusive core/retrieval phases.
• Added the exact append-LF incremental preflight.

How to review

Start with the incremental wall receipt in the contracts/runtime/CLI path, then the installed timing cohort contract, then the two evidence scripts. Product repairs will follow as focused commits in this same draft lane.

Verification

• Node benchmark and remediation-ledger tests: 186 passed.
• codestory-contracts: 115 passed across unit and integration targets.
• Focused store promotion, runtime incremental, CLI receipt, and rendering tests passed.
• cargo fmt --all -- --check and git diff --check passed.
• Redis exact append-LF, five repeats: 19.702-21.048 seconds, 100% outer-wall reconciliation.

Risk and non-claims

This commit records and separates the failing work; it does not claim the accuracy or performance regression is repaired. No broad qualification, calibration, packaging, or release proof has run.

[TheGreenCedar]

Accuracy slice complete on 166e87e.

Dart is 3/3 on the unchanged scorer with all four claims, zero forbidden or unsupported-proof errors, and zero source reads. The packet is 16 rows / 15,978 bytes and contains all required helper, client, finalization, request, response, and IO transport source. The Monolog, Alamofire, Gin, Requests, ripgrep, and SWR structural watchlist has no carrier losses; compacted graph relations retain their semantics.

The draft remains open for Phase 2. Broad qualification has not run.

[TheGreenCedar]

0.18 accuracy candidate invalidated (decontamination)

PR #2100 / branch codex/2099-v018-remediation is not mergeable as an accuracy candidate. Contaminated accuracy work is quarantined; a clean decontamination lane replaces it.

Quarantine identities

Artifact	Value
Contaminated branch	codex/2099-v018-remediation @ 166e87e3bb6c8f553525ced7e36ab27a843790cc
Dirty worktree (preserved, not rewritten)	/Users/albert/.codex/worktrees/2099-v018-remediation/CodeStory
Integration base	dev/codestory-next @ a41e605ea01e9e2c8b400eb5ee5456efd05f060e
Replacement branch	codex/2099-v018-decontamination (from a41e605e)
Evidence root	/Users/albert/.codex/evidence/codestory-v018-decontamination/
Failed product receipt (preserved)	/Users/albert/.codex/evidence/codestory-v018-a41e605e-failed-product-receipt

SHA-256 digests

aefaaac79115bb538e23d495539b2145429bafd278f7702ef8c2a10e63393088  dirty-remediation-complete.binary.patch
130c4a084285af4a9324a342f8bd33284d7637e8bb2973367cba640c850e9a70  dirty-remediation-performance.binary.patch
cf85c6a3029115393c89eaceb0b1f94bd8d733bdd2f563530969d1f80f1a5523  dirty-remediation-untracked.tar.gz
ad36dfa86d8056c2eedf9e0df0788b0922821fc491adfc9aeb7ed166d740eace  dirty-remediation-git-status.txt
a5fc6dee4f4f4a5485a0b1ab8a84df557c2c1330c918dc924faf6b9336e0e658  dirty-remediation-identity.txt
3a4bfce662d7cce7b006d334ca8d176a56cf55febfe057fe8f1b32df664bec64  unreviewed-partial/packet_evidence_carriers.rs.binary.patch
98043904b94901db73fb726fd088b82fb5161157ecdb9067f3929422e158b0ce  unreviewed-partial/packet_evidence_carriers.rs.worktree
6e2f23551c2b5e36d7741e70b9b5b9aa334fc10f82b1210d609661128a9c8293  unreviewed-partial/packet_evidence_carriers.rs.HEAD
b15c1380f67d16bbae564a7a9641fe1332f5a4148790fb1150f8f78387df6f2c  dirty-untracked-files/.../core_publication.rs
6f1494eb6a1dce7125ee1977a894f6d767ffc9f6459988871f17a6a280866d62  dirty-untracked-files/.../core_generation.rs
d796693321990719759a9e9ac82ff1c5cb91d18505fcb3c3d3a64f8481c2ca02  dirty-untracked-files/.../codestory-incremental-refresh-microprobe.mjs

Index tree at capture (matches HEAD tree; dirty changes unstaged): 667a4d7250807e8a17f4908540b927225d50f9c9

Policy

• Accuracy commits 2f4d0b82..166e87e3 will not be replayed onto the decontamination branch.
• Dirty performance bytes stay quarantined under the evidence root until Phase 5 causal-unit replay.
• Uncommitted packet_evidence_carriers.rs edits are archived separately as unreviewed partial work.
• Historical 18-task / Dart accuracy rows are marked evidence_eligibility: "contaminated_development" (release_gate: false, generalization_claim: forbidden) and are never a release or generalization gate.
• No broad package / calibration / release qualification is running for this candidate (only unrelated protected-runner heartbeat was queued).

Parent: #2098 · Child: #2099 · Quarantined PR: #2100

[TheGreenCedar]

Quarantine reminder (Phase 8)

This PR remains historical quarantine and is not mergeable as an accuracy / 0.18 product candidate.

Decontamination supersedes this lane on draft PR #2101 (codex/2099-v018-decontamination @ c18d79485f03b3c930b6a5170748429827f04027). Do not merge #2100; do not replay accuracy commits into the decontamination head.

[TheGreenCedar]

Superseded. Contaminated remediation lane; not a candidate. Active work is #2103.