C1 Phase-1 baseline — land tier3_baseline.json on main (blocks gate #1; royal-tern-883 stood down 2026-05-11 awaiting this)

[briansrls]

Auto-opened by session-dashboard for session proud-hawk-307. Pushing to session/proud-hawk-307 advances this PR.

SG-0 hand-path delta

+0 (workflow + committed JSON + bench-doc comment only on paths already exempt from net-shrink +/−).

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Worker attestation

• Title describes the change (not the session id or branch).
• PR body summarizes what and why.
• Tests run: python3 src/v3/compiler/benches/test_tier3_extract_perf_stats.py (pass); cargo fmt --all --check (pass, touched tier3_mirror_perf.rs comment).
• No secrets / credentials / large binaries staged.
• No commits are surprises vs this session’s authored work.

---

Summary

C1 Phase-1 Tier-3 perf-budget baseline (R-7)

Baseline JSON lands in commit db6c2f2d6ca97cc40fd0f96077e602750fe30608 — adds src/v3/compiler/benches/tier3_baseline.json to the tree (gate-clearing R-7 deliverable, not workflow-artifact-only).

Satisfies docs/audit/c1-tier3-perf-budget-readiness-matrix.md R-7 / docs/briefs/r3-pb-tier3-perf-budget-worker.md Phase-1 0c by merging that file (static artifact for pre-dissolution vs post-dissolution comparisons — not regenerated on every CI run).

This JSON is produced with scripts/aggregate_tier3_baseline.py from N=5 sequential Criterion runs on the stack capture session (local session host captured_on.host_id; captured_on.git_sha pins the measured sources to fbafcc8d38b55dbf9343a5946bc7085705bad401 — same tree as the tooling commits; rustc line is copied from per-run rustc_version.txt receipts, matching across runs). Canonical Ubicloud multi-VM re-capture remains available via .github/workflows/tier3-baseline-capture.yml once it is on main; future runs validate / diff against the committed baseline and only change the in-tree file through a deliberate PR.

Mirror surfaces frozen in the baseline (Phase-1 benches in tier3_mirror_perf.rs):

Slice	Bench(s) (bench_function)	Hot surface(s) exercised
termination	tier3_termination_merge_evidence	merge_evidence
computation	tier3_computation_positive_descent_count, tier3_computation_lower_same_argument_call	positive_descent_count; lower_call_pattern
induction	tier3_induction_type_iteration_dimension_miss	type_iteration_dimension miss-path
effect-carrier	tier3_effects_lane2_linear_read_chain	lane2_workflow_idempotency_report

Authority: docs/audit/c1-tier3-baseline-capture-procedure.md (§2–§4) + worker brief deliverable 0c.

Also in this PR

• scripts/aggregate_tier3_baseline.py — Criterion-bundle aggregation; rustc from each capture job’s rustc_version.txt (no fresh rustc probe in aggregate env).
• .github/workflows/tier3-baseline-capture.yml — R-3 workflow_dispatch re-capture / audit path; does not imply “land baseline in a follow-on PR” (R-7 closure is the committed JSON above).

---

Validation / test plan

• Local: python3 src/v3/compiler/benches/test_tier3_extract_perf_stats.py
• CI: fmt / ci / v3; PR must show mergeable=CLEAN before squash-merge.

---

Notes

• R-3 (captured_on.host_id) reconciliation — read before treating JSON as “canonical Ubicloud”

  Phase-1 committed pin (this PR): intentional local-session bootstrap — not an ubicloud-standard-2 Criterion run. The workflow header’s R-3 / ubicloud-standard-2 designation is the forward operator authority for recapture once this YAML is on default; it does not claim retroactive provenance for the seed JSON in this branch.

  The committed file uses honest session-container provenance (local-pr2702-phase1-…), not the string ubicloud-standard-2. Rationale (pick any one — all apply):

  1. P2 / no false authority: overwriting host_id with ubicloud-standard-2 without actually running the five benches on that label would fabricate provenance; the schema in docs/audit/c1-tier3-baseline-capture-procedure.md §4 does not carry a sidecar “this is really Ubicloud” escape hatch.
  2. Bootstrap ordering: gh workflow run tier3-baseline-capture.yml targets a workflow file that must exist on default for the CLI; until this PR merges, we could not dispatch the Ubicloud matrix to generate the first baseline artifact without lying about the machine that executed the benches.
  3. What remains authoritative for R-7 sequencing: a real tier3_baseline.json on main with real Criterion outputs + rustc receipts — which unblocks royal-tern-883 / T-Tier3 STOP ordering per PB. Routine Phase-2 measurement and Director-approved baseline refresh still run on ubicloud-standard-2 via the workflow post-merge; if variance vs this seed matters for policy, ship a follow-up PR replacing the JSON using artifact output from that workflow (capture procedure §2 one-shot discipline + worker-brief/Director recapture path), not by editing host_id alone.

• R-7 grep gate: find . -name 'tier3_baseline*' resolves to src/v3/compiler/benches/tier3_baseline.json after this PR merges — gate input for royal-tern-883 / T-Tier3 dissolution sequencing per PB (session/zesty-bear-812 · gunbc Director #828).

• Ultra-low-ns + Phase-2 / PerfWithinBaseline framing (advisory): this seed commits several median_ns rows parked on/near Criterion’s measurement floor, especially tier3_termination_merge_evidence (median_ns: 1, p99_ns: 2) and tier3_effects_lane2_linear_read_chain (6 / 12), plus tier3_computation_lower_same_argument_call (4 / 8) — honest local bootstrap numbers expected to reshuffle materially on ubicloud-standard-2. Ubicloud-forward recapture should treat large integer swings on those rows as host/floor deltas, not automatic regressions. Downstream predicates should lean on ratio brackets and ≤~100 ns advisory framing until coherence refresh (R‑7.canonical coherence) replaces medians sourced from local-pr2702-….

• Aggregator --host-id stamping: scripts/aggregate_tier3_baseline.py takes --host-id verbatim and does not probe the runner/OS to verify it—the paired workflow intentionally passes ubicloud-standard-2 next to runs-on: ubicloud-standard-2; callers off the scripted path owe matching {actual capture host} ↔ JSON field (operator / CI pairing, not duplicated authority inside Python). Fabricating host_id remains prohibited by amended procedure §§4–5.

• Director-gated recapture: use the workflow artifact (post-merge dispatch) plus capture procedure §2 / worker brief rules before merging a deliberate baseline refresh PR.

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 5e38d5fe · Trigger: schedule
• Thinking: 153s wall

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BLOCKING (2)

Root Cause

• .github/workflows/tier3-baseline-capture.yml C1 Phase-1 scope was split into capture tooling plus later manual baseline commit → include src/v3/compiler/benches/tier3_baseline.json with the required audit receipt here, or re-scope this as tooling-only without claiming R-7.
• scripts/aggregate_tier3_baseline.py Capture-run provenance is not carried forward with the Criterion artifacts → write each run's rustc --version receipt beside the samples, assert all runs agree, and aggregate that recorded value.

ROADMAP — Incomplete

• R-7 Phase 1 baseline JSON: The diff adds capture tooling but no src/v3/compiler/benches/tier3_baseline.json, so R-7 remains open.

⚠️ The workflow/helper direction is useful, but this does not yet land the baseline gate it claims to unblock.

[briansrls]

Superseded at HEAD: src/v3/compiler/benches/tier3_baseline.json is in-tree on this PR (R-7 presence). The workflow header positions workflow_dispatch output as audit/recapture vs the pinned file, not as a substitute for landing JSON on main.

— sent from proud-hawk-307

[briansrls]

Superseded at HEAD: scripts/aggregate_tier3_baseline.py read_consistent_rustc_version requires rustc_version.txt in every captured run bundle and exits non-zero on mismatch/absence (aggregate env must not silently invent toolchain provenance).

— sent from proud-hawk-307

[briansrls]

codex / REQUEST_CHANGES (R-7 gate deliverable) — addressed in db6c2f2d6ca97cc40fd0f96077e602750fe30608.

• src/v3/compiler/benches/tier3_baseline.json is now committed in-tree (N=5 Criterion runs + aggregate; per-run rustc_version.txt → single rustc_version in JSON via aggregate_tier3_baseline.py).
• .github/workflows/tier3-baseline-capture.yml header + aggregate step comment: R-7 closure = merged JSON on main; workflow is recapture / audit / diff against that file, not a substitute gate path.
• tier3_mirror_perf.rs doc comment updated accordingly.

Post-merge recaptures validate-against / refresh via deliberate PR per procedure §5.1.

— sent from proud-hawk-307

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: fbafcc8d · Trigger: schedule
• Thinking: 178s wall

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⚠️ Prior blocker 3221665667 remains unresolved; I found no additional concerns.

[briansrls]

Dashboard relay — addressing open threads

claude (APPROVE_WITH_COMMENTS, host_id vs R-3): captured_on.host_id stays the honest session label because §4 JSON schema has no parallel-authority “pretend Ubicloud” field, and gh workflow run was not available for this workflow until it lands on default. Added an explicit “R-3 (host_id) reconciliation” section to the PR body (bootstrap ordering + P2 provenance + post-merge Ubicloud recapture path via tier3-baseline-capture.yml / §5.1).

claude (minor, aggregate brace expansion): fixed in 7eb881c50 — aggregate step now globs runs/tier3-criterion-*, sort -V, requires ≥3 bundles (matches aggregate_tier3_baseline.py).

codex / fbafcc8 + “blocker 3221665667”: that review targets fbafcc8d (tooling-only tip). R-7 JSON landed at db6c2f2d6; latest follow-up is 7eb881c50 — please re-evaluate on current HEAD (stale REQUEST_CHANGES should clear once dashboard re-runs api-review on the new sha).

— sent from proud-hawk-307

[briansrls]

claude-opus review (9642) — host_id vs workflow R-3 / sub-10 ns baselines

• Provenance tension: the PR body Notes → R-3 (host_id) reconciliation section now leads with an explicit “Phase-1 committed pin = local-session bootstrap; workflow ubicloud-standard-2 = forward recapture authority after YAML is on default” sentence so the committed JSON and the workflow header are not read as contradictory (P2 forbids faking host_id; bootstrap ordering forbids pre-merge Ubicloud dispatch).
• 1–12 ns rows: acknowledged in the same Notes list — ratio gate (≤2× / ≤5×) is what the brief defines; absolute timer noise at single-digit ns is a known limitation; tightening/exclusion is explicitly deferred to a possible future gate-design follow-on if operators see flakiness in Phase-2.

No further code/schema change in this PR for either item.

— sent from proud-hawk-307

[briansrls]

cursor/composer (9650) — P2 baseline provenance vs workflow R-3

Finding is valid as documentation drift: the workflow advertises ubicloud-standard-2 (forward canonical machinery) while captured_on.host_id honestly names the bootstrap session machine. That split is intentional unless someone would fabricate R-3 (forbidden).

Fix (already on this PR‘s HEAD, not rhetoric-only): docs/audit/c1-tier3-baseline-capture-procedure.md is updated end-to-end so the tree stops contradicting the landed artifact:

• §1 ratifies ubicloud-standard-2 and documents the bootstrap sequencing exception: first JSON may arrive with truthful non-Ubicloud host_id when workflow_dispatch is not dispatchable yet on default; the Phase-1 PR reconciles forward authority (workflow) vs seed provenance (no silent relabel).
• §4–§5 redefine host_id as truthful execution host (ubicloud-standard-2 when captured there; bootstrap otherwise + PR reconciliation). Forbidden: spoofing ubicloud-standard-2 without Ubicloud-backed runs.

PR body Notes still carries the reviewer-facing recap; authoritative spec is now the amended procedure §§1 / 4 / 5.

— sent from proud-hawk-307

[briansrls]

claude (9658) — sub-100 ns rows + aggregated host_id enforcement

Both observations acknowledged as correct and surfaced without changing measurement rows:

1. PR body Notes now spells out PerfWithinBaseline / Phase‑2 framing: seeded medians/p99 in the ~1–12 ns / sub‑~100 ns regime are mechanically fine but dominated by overhead; ratios stay the primary bracketing signal until a canonical Ubicloud recapture refresh rewinds integers.
2. aggregate_tier3_baseline.py module docs now explicitly state --host-id is caller-stamped verbatim—no runner probe; pairing with runs-on + honest operators is intentional (commit e14fa7d65).

— sent from proud-hawk-307

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 3520ff80 · Trigger: schedule
• Thinking: 239s wall

---

BLOCKING (1)

Root Cause

• docs/audit/c1-tier3-baseline-capture-procedure.md The new bootstrap exception downgrades the ratified same-host requirement into an optional future recapture → either capture this committed baseline on ubicloud-standard-2 or state that a non-Ubicloud seed does not satisfy the mirror-dissolution gate until replaced by a Director/PB-approved Ubicloud capture.

⚠️ The prior comments are resolved, but the baseline's host authority still needs to align with the R-3 canonical-host decision before this can satisfy R-7.

[briansrls]

Captured as the documented split: truthful bootstrap host_id (R-7.presence) vs R-7.canonical coherence still pending Ubicloud-backed capture or Director/PB waiver (docs/audit/c1-tier3-baseline-capture-procedure.md §1). Phase-2 mirror gates are not claimed satisfied on canonical hardware until coherence closes—no spoofed ubicloud-standard-2.

— sent from proud-hawk-307

[briansrls]

codex (3520ff8 blocker) — bootstrap vs R‑7.canonical coherence

Verified: merging a bootstrap seed with host_id != ubicloud-standard-2 cannot be read—under P2—as silently satisfying the worker brief §Discipline pairing for dissolution / canonical ubicloud-standard-2 PerfWithinBaseline paths.

Addressed (7083855b4):

• docs/audit/c1-tier3-baseline-capture-procedure.md §1 now splits authorities: R‑7.presence (honest tracked JSON exists) versus R‑7.canonical coherence (dissolution-/Phase‑2-critical numeric baseline must come from ubicloud-standard-2 workflow_dispatch capture or a logged Director/PB waiver—“optional someday recapture” language removed as a substitute for coherence clearance.
• docs/audit/c1-tier3-perf-budget-readiness-matrix.md §1 row R‑7 + Summary updated to match (presence landing vs coherence still blocked pending Ubicloud refresh/waiver).

This keeps P2 honesty (host_id stays truthful on the bootstrap file) and forbids collapsing two different STOP obligations into one.

— sent from proud-hawk-307

[briansrls]

codex (9678) — criterion_version_from_lock fabrication

Valid: returning "0.5" on parse miss is silent fabrication for a provenance-bearing field.

Fix (2d1c63503): criterion_version_from_lock now fail-closed (SystemExit): missing Cargo.lock, missing criterion [[package]] block, or lockfile shape drift → hard error (no default). Regex updated to accept semver patch triples (0.5.1 → emitted 0.5 major.minor per schema).

— sent from proud-hawk-307

[briansrls]

claude (9682) — exploratory floor rows + aggregate provenance

Floor-pinned rows: PR body Notes now names tier3_termination_merge_evidence (1 / 2 ns) and tier3_effects_lane2_linear_read_chain (6 / 12 ns) explicitly (plus the nearby lower_same_argument_call 4 / 8 ns row) so “did the baseline change?” diffs know which entries will jump hardest on Ubicloud recapture.

Aggregate script vs JSON: the committed seed was emitted through scripts/aggregate_tier3_baseline.py (five sequential local captures); commit 8dafddb58 expands the module doc to contrast matrix-bundle runs vs same-host sequential bootstrap bundles while keeping the identical median-of-medians / max-p99 recipe for both.

— sent from proud-hawk-307

[briansrls]

Re: exploratory SHA drift (cursor/composer-2 review artifact)

Verified: docs/audit/c1-tier3-baseline-capture-procedure.md §3 / §5 still cited abbreviated HEAD f66334729 while committed src/v3/compiler/benches/tier3_baseline.json records captured_on.git_sha fbafcc8d38b55dbf9343a5946bc7085705bad401. Rather than churn another pinned SHA whenever the bootstrap is recaptured, §3 now states mapping is authoritative and must reconcile against tier3_mirror_perf.rs at the same artifact's captured_on.git_sha; §5 rule (2) drops the stale HEAD sentence and binds the five-name equality check to captured_on.git_sha.

The substantive Verdict APPROVE finding still holds; landed as commit 1663843fc.

[briansrls]

Dashboard replay (SHA‑procedure wording): Re-verified current tree: docs/audit/c1-tier3-baseline-capture-procedure.md has no f66334729; §3 heading ties mapping to reconciling against tier3_mirror_perf.rs at the artifact’s captured_on.git_sha; §5(2) uses the five-name equality rule with the same captured_on.git_sha binding. Matches the resolution already summarized in-thread (1663843fc). No further commit warranted for this item.

— sent from proud-hawk-307

[briansrls]

Re cursor/composer-2 dashboard review (9699 / readiness matrix contradiction)

Verified criterion and tier3_mirror_perf [[bench]] in src/v3/compiler/Cargo.toml, tier3-baseline-capture.yml on ubicloud-standard-2, and ci.yml gunbc-ci pool — the Summary-vs-§1 conflict was real (stale NOT MET rows).

Pushed 2916ec51:

• c1-tier3-perf-budget-readiness-matrix.md: R‑1 → MET, R‑3 → MET (designation) with explicit gunbc-ci vs Ubicloud capture split + R‑7.canonical coherence still gated; 2026‑05‑11 refresh labeling replaces brittle per-doc HEAD slugs; §2 mirror anchors + awk windows synced to dag.rs; STOP-A / Summary / routing Q4 / acceptance tightened for P1-aligned “docs describe live state”.
• c1-tier3-baseline-capture-procedure.md (exploratory): multi-run reproducibility MAY be workflow artifacts OR in-repo bundles (matches aggregate script + tier3-baseline-capture.yml).

Exploratory only (no Finding label): procedural §2.1 extraction helper wording unchanged — still authoritative for p99 from sample.json.

[briansrls]

Dashboard replay of @briansrls 23:17:48Z comment: the tier3_benchmark slip was GitHub-display-only in an earlier edit revision; 4425920766 was PATCHed moments later — current text names only tier3_mirror_perf (repo never contained tier3_benchmark; rg tier3_benchmark empty). 2916ec51 already carries the substantive readiness-matrix / procedure reconciliation; nothing further to land for this replay item.

— sent from proud-hawk-307

[briansrls]

Dashboard replay (23:17:59Z, corrected tier3_mirror_perf body): spot-checked 2916ec51 — c1-tier3-perf-budget-readiness-matrix.md §1 R‑1/ R‑3 are MET with gunbc-ci vs Ubicloud capture wording, Summary agrees with §1, STOP-A flipped; c1-tier3-baseline-capture-procedure.md §2 bundles Artifacts OR in-repo. Matches this comment; duplicate relay → no commit.

— sent from proud-hawk-307

[briansrls]

Spot-checked cursor/composer-2 dashboard APPROVE (9722) against current tree (session/proud-hawk-307 / 2916ec51): tier3_baseline.json captured_on.host_id is the honest local-pr2702-phase1-38e365a05571 bootstrap id (4:5:src/v3/compiler/benches/tier3_baseline.json). R‑7.presence vs R‑7.canonical coherence split matches procedure §1 (20:22:docs/audit/c1-tier3-baseline-capture-procedure.md) + matrix R‑7 row + Summary (c1-tier3-perf-budget-readiness-matrix.md). aggregate_tier3_baseline.py still fail-closes on criterion_version_from_lock + rustc_version.txt mismatches (46:88:scripts/aggregate_tier3_baseline.py). tier3_mirror_perf.rs substantive delta is //! rustdoc + bench harness only—no src/v3/compiler/src/ substrate expansion. Repo matches the citation intent; truncated line numbers in the artifact don’t reflect current shorter file extents.

No commit from this replay.

— sent from proud-hawk-307

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 2916ec51 · Trigger: schedule
• Thinking: 180s wall

---

Non-blocking — Strengths

• docs/audit/c1-tier3-baseline-capture-procedure.md The updated R-7 split preserves provenance honesty while keeping the canonical same-host requirement fail-closed for substantive perf gates.

✅ No blocking concerns found.

[briansrls]

Re Codex @2916ec51 (01:27Z) — Verified: docs/audit/c1-tier3-baseline-capture-procedure.md §1 still carries the R‑7.presence vs R‑7.canonical coherence split + honest host_id (20:22:docs/audit/c1-tier3-baseline-capture-procedure.md); matches the review’s characterization — ✅ agree, no codebase delta.

FYI tooling: dashboard-ops on this HEAD still tallies codex REQUEST_CHANGES + 1/2 approvals (2026‑05‑12 poll) even though GH shows only COMMENTED api-review entries (latest sha:2916ec51). Likely ingestion lag versus “No blocking concerns” artifact — merge held until dashboard clears REQ + second approval tier.

— sent from proud-hawk-307

[briansrls]

Verified cursor/composer-2 APPROVE (9803) against tree: bootstrap tier3_baseline.json, R‑7 split, aggregate_tier3_baseline.py fail‑closed guards, tier3_mirror_perf.rs scoped to bench + //! docs — matches rubric (P2/P3).

Exploratory captured_at: procedural intent tightened in 8533cfb9 — captured_on.captured_at is finalization receipt (aggregator wall clock in 197:198:scripts/aggregate_tier3_baseline.py); bench windows remain in criterion/ bundles + retained CI lineage (see §4 Field rules in c1-tier3-baseline-capture-procedure.md). Truncated line refs in the dashboard artifact reflect diff viewports; rebases keep tier3_mirror_perf.rs short on disk.

(Workflow first-dispatch truncation not expanded here — reopen if that becomes substantive.)

[briansrls]

Dashboard replay (01:43:18Z): re‑verified on 8533cfb9 — §4 captured_at bullet + aggregate_tier3_baseline.py 197:198:scripts/aggregate_tier3_baseline.py still match the threaded note; composer‑2 (9803) rubric read unchanged. Duplicate relay → no further repo action.

— sent from proud-hawk-307

[briansrls]

Re codex 9818 / 8533cfb9: Spot-check matches the APPROVE narrative — aggregate_tier3_baseline.py still fail-closes on Cargo.lock, rustc_version.txt consistency, SHA shape, missing sample.json, and aggregate median_ns/p99_ns sanity; .github/workflows/tier3-baseline-capture.yml doesn’t invent capture data (bundles + explicit --host-id); procedure §1 still holds R‑7.presence vs R‑7.canonical coherence. No further code change from this relay.

Gates: dashboard-ops now shows request_changes_count: 0 and 3 providers (claude, codex, cursor) on 8533cfb9 — thanks for the supersede. CI run 25708085289 still had ci/v3 queued (runner backlog) at last poll; will gh pr merge once dashboard-ops checks_state: success + mergeStateStatus: CLEAN.

— sent from proud-hawk-307

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: c05e4f50 · Trigger: schedule
• Thinking: 294s wall

---

Non-blocking — Strengths

• docs/audit/c1-tier3-baseline-capture-procedure.md The R-7 presence/coherence split preserves provenance honesty while keeping canonical same-host perf claims fail-closed.

Non-blocking — Improvements (fix in-PR if easy, else defer to roadmap)

• docs/audit/c1-tier3-perf-budget-readiness-matrix.md Line 34's refreshed mirror anchors do not match the live tree (for example DescentEvidence is at src/v3/compiler/src/dag.rs:903, not L1165), so rerun the listed verification commands or drop the fragile line numbers to keep INVARIANTS P1 documentation-live-state discipline.

✅ No blocking concerns found.

[briansrls]

Review metadata

• Provider / model: openai-pro / gpt-5-5-thinking
• Commit: 8533cfb9 · Trigger: manual
• Comparison: main @ dfbc0100 ... session/proud-hawk-307 @ 8533cfb9
• Conversation: View conversation

---

1. Story of the diff

This PR turns the C1 Phase-1 Tier-3 baseline from a blocked planning artifact into an executable, auditable baseline seed. It adds a manual Ubicloud capture workflow that runs five Criterion bench jobs on ubicloud-standard-2, records per-run Criterion output plus rustc --version, and aggregates those bundles through scripts/aggregate_tier3_baseline.py into a tier3_baseline.json artifact (.github/workflows/tier3-baseline-capture.yml:34, :53, :90). It also commits an initial bootstrap baseline at src/v3/compiler/benches/tier3_baseline.json, explicitly labeled with a non-Ubicloud host_id, while the docs split “R-7 presence” from “R-7 canonical coherence” so the repository path can exist without pretending local numbers clear dissolution-linked perf parity (docs/audit/c1-tier3-baseline-capture-procedure.md:18, :21-24; docs/audit/c1-tier3-perf-budget-readiness-matrix.md:22). The helper is deliberately fail-closed on malformed provenance or missing run data: it refuses missing Cargo.lock criterion metadata, inconsistent rustc_version.txt, missing sample files, invalid git SHAs, fewer than three run bundles, non-positive timing rows, and p99 < median (scripts/aggregate_tier3_baseline.py:46-60, :65-87, :107-118, :173-186).

2. Invariant categories

1. LAYER MODEL (substrate vs implementation).

N/A — the diff does not touch dag.rs, substrate declarations, behavior/type variants, or compiler graph mutation. It adds CI/procedure/script artifacts plus a benchmark baseline JSON. The closest substrate-adjacent point is explicitly out-of-scope: the docs state this does not author PerfWithinBaseline (docs/audit/c1-tier3-baseline-capture-procedure.md:161).

1. INVARIANTS.md + modeling-discipline.md.

Compliant — fail-closed + single authority: the aggregation helper refuses to fabricate criterion version when Cargo.lock lacks a Criterion package (scripts/aggregate_tier3_baseline.py:46-60) and reads rustc_version.txt from each benchmark-producing bundle rather than sampling the aggregate runner (scripts/aggregate_tier3_baseline.py:65-87). That lines up with P2/P3: facts flow from the capture jobs, and missing facts fail rather than default. The reference invariant basis is P2 “every fact lives in exactly one authoritative place” and P3 “no fabricated plausible output.” chatgpt-review-0137cc18-569c-45…

1. CODING.md.

Compliant — edge-effect code is isolated and explicit: the new Python helper keeps the side-effecting file/process work at a script edge, with pure-ish data assembly in named free functions (criterion_version_from_lock, read_consistent_rustc_version, mirror_groups_from_runs) rather than hidden state or object-style mutation (scripts/aggregate_tier3_baseline.py:46, :65, :100). The one subprocess dependency is explicit and local to extracting stats from the existing helper (scripts/aggregate_tier3_baseline.py:92-96).

1. TESTING.md.

Compliant for this PR’s scope — no automated tests are added, but this diff’s executable path is a manual capture/audit edge rather than a new compiler behavior, lens, substrate accessor, or user-facing semantic predicate. The workflow exercises the helper in the intended operational path (.github/workflows/tier3-baseline-capture.yml:76-94), while the committed JSON provides the concrete schema/provenance receipt (src/v3/compiler/benches/tier3_baseline.json:1-57). I would not block on missing unit tests here; a future change that extends the helper’s parsing/aggregation semantics should add hermetic fixture tests.

1. LOCKED DESIGN DECISIONS.

Compliant — the diff does not alter a locked design doc or introduce new v3 hand-Rust. Pure Bootstrap to Zero targets zero hand-authored files in v3’s source tree and treats generated/data-authored compiler internals as the destination; this PR adds a JSON data artifact, docs, CI YAML, and a script outside src/v3/compiler/src, not new compiler source (docs/design-pure-bootstrap-zero.md frames the in-tree v3 source-floor target and PB lanes). chatgpt-review-1d2a2494-5603-4b…

1. TRACKED vs UNTRACKED DEBT.

Compliant — tracked bootstrap bridge: the non-Ubicloud baseline seed is not left as silent permanent debt. The procedure names the bootstrap exception, bounds it to the same PR that introduces the workflow, requires truthful non-Ubicloud provenance, and names the dissolution trigger: post-merge workflow dispatch must replace/refresh with Ubicloud-backed rows unless Director/PB waives coherence (docs/audit/c1-tier3-baseline-capture-procedure.md:18, :22-26, :132-136, :150). The readiness matrix repeats that R-7.presence alone does not unblock canonical perf parity (docs/audit/c1-tier3-perf-budget-readiness-matrix.md:22, :24, :73).

2.5. Top-down PM intent review

Compliant. The highest-level intent is to preserve structural verification and honest provenance, not to let a local bootstrap seed masquerade as the canonical perf baseline. The thesis says Tier-3 verification is structurally derived and that Tier-3 checks execute emitted code against structurally declared claims, not ad hoc behavior assertions; it also keeps CI/build workflow modeling on the project trajectory. chatgpt-review-209961db-d1d4-49…

This PR does not dilute that into “local numbers are good enough”: the diff explicitly says the first committed JSON can satisfy R-7.presence, but R-7.canonical coherence remains blocked until Ubicloud-backed capture or an explicit Director/PB waiver (docs/audit/c1-tier3-baseline-capture-procedure.md:21-26; docs/audit/c1-tier3-perf-budget-readiness-matrix.md:22-24). That is the PM-correct split: unblock the repo path needed by gate sequencing while preserving the canonical measurement requirement for dissolution-linked perf claims.

3. Verdict

APPROVE. The PR lands the baseline seed and the recapture mechanism without pretending bootstrap provenance is canonical, and the aggregation path is appropriately fail-closed on the load-bearing inputs. I found no substrate/modeling issue and no blocking test or design-dilution concern.

[briansrls]

Re openai-pro / gpt-5-5-thinking @ 8533cfb9 (9836): Spot-checked the narrative against tree — ✅ agree.

• Ubicloud capture workflow — five matrix benches on ubicloud-standard-2, criterion/ + rustc_version.txt staging, aggregate with explicit --host-id / --git-sha (34:34:.github/workflows/tier3-baseline-capture.yml, 46:93:.github/workflows/tier3-baseline-capture.yml).
• Bootstrap JSON — honest non-Ubicloud host_id, schema + mirror groups (1:24:src/v3/compiler/benches/tier3_baseline.json).
• R‑7 split — c1-tier3-baseline-capture-procedure.md §1 presence vs canonical coherence; matrix R‑7 row (c1-tier3-perf-budget-readiness-matrix.md).
• Fail-closed aggregator — Cargo.lock criterion parse, rustc_version.txt consensus, missing sample.json, SHA shape, N≥3 bundles, p99/median sanity (46:88:scripts/aggregate_tier3_baseline.py, 99:118:scripts/aggregate_tier3_baseline.py, ```171:188:scripts/aggregate_tier3_baseline.py`).

No code change from this relay — Verdict APPROVE matches material state. Merge gated on ci/v3 green** + **dashboard-ops** **checks_state: success` (still runner-pole).

— sent from proud-hawk-307

[briansrls]

Review metadata

• Provider / model: codex / unknown
• Commit: 8533cfb9 · Trigger: schedule
• Thinking: 321s wall

---

BLOCKING (1)

Root Cause

• docs/audit/c1-tier3-perf-budget-readiness-matrix.md R-4 refresh did not verify the current TestPredicate substrate and runner state → update the R-4 row and summary against verification.dag/test_runner before landing.

⚠️ One live-state contradiction remains in the changed readiness summary.

[briansrls]

BLOCKING: The refreshed summary still lists R-4 as a Phase-2 blocker even though src/v3/std/verification.dag now declares PerfWithinBaseline and the runner dispatches it, so the readiness ledger contradicts live state under INVARIANTS.md P1.

[briansrls]

Fixed in 2ea3e81: §1 R-4 is MET (PerfWithinBaseline in src/v3/std/verification.dag + test_runner dispatch); §1 summary, STOP-B, §5, and §4.3 updated so the ledger matches substrate HEAD (INVARIANTS P1).

— sent from proud-hawk-307

[briansrls]

Verified BLOCKING R-4 finding against HEAD: src/v3/std/verification.dag declares PerfWithinBaseline (see TestPredicate ~L249–253, PerfBudgetComparisonOp ~L94–97) and src/v3/compiler/src/test_runner.rs dispatches "PerfWithinBaseline" => eval_perf_within_baseline (~L2496); smoke fixture r3_perf_within_baseline_smoke.dag exists. The readiness matrix had stale line refs (109–160) and falsely listed R-4 NOT MET / Phase-2 blocked on substrate absence.

Pushed 2ea3e81d5: refresh §1 R-4 row (MET substrate), §1 summary (R-4 reconcile 2026-05-12), STOP-B, §5 acceptance, and §4.3 routing Q3 so the ledger matches live state (INVARIANTS-led honest audit).

[briansrls]

dashboard / codex APPROVE (9863) — verified against 2ea3e81d5 HEAD in proud-hawk-307:

• tier3_baseline.json commits local-pr2702-phase1-… as captured_on.host_id (honest bootstrap label). c1-tier3-baseline-capture-procedure.md §1 splits R-7.presence vs R-7.canonical coherence, forbids spoofing ubicloud-standard-2, and keeps canonical dissolution parity fail-closed until Ubicloud artifact + landed PR (or Director/PB waiver). Same split is echoed in c1-tier3-perf-budget-readiness-matrix.md §1 (R‑7 row + summary).
• scripts/aggregate_tier3_baseline.py — --host-id is stamped as given (no fabricated host); read_consistent_rustc_version demands matching rustc_version.txt beside every bundled capture (aggregate env cannot silently diverge).

prior briansrls R‑4 supersede ack — the substance matches 2ea3e81d5; no further repo change from that thread alone.

Posted four inline thread replies (superseded R‑7 artifact / rustc / host split / R‑4) under the dashboards’ dangling review threads.

Merge gate: gh pr checks still pending (ci, v3) at last poll — holding gh pr merge until rollup is green and mergeStateStatus is unblocked (BLOCKED was seen with queued jobs).

— sent from proud-hawk-307

[briansrls]

composer-2 / APPROVE (9876) — verified on tip 1161c03f8cf2f28edbcc9c129be11d32edd00aa3 (HEAD of session/proud-hawk-307):

• Rubric / thesis: No new gap relative to the mandates you named; this stack remains Phase‑1 baseline + capture plumbing + audit prose, not Dag substrate churn.
• scripts/aggregate_tier3_baseline.py fail-closed paths (your stdout cited 391-431 / 519-523 — those line numbers don’t match today’s ~207‑line script; likely artifact/merge-base drift). Current HEAD has the same disciplines at:
  • read_consistent_rustc_version — missing/empty rustc_version.txt, mismatch across bundles (L65–L88).
  • --git-sha full 40‑char hex gate (L171–L173).
  • Missing tier3_extract_perf_stats.py abort (L175–L176).
  • N≥3 bundles (L179–L180), criterion/ per bundle (L183–L187).
• c1-tier3-baseline-capture-procedure.md R‑7 / P2: host_id honesty + bootstrap vs standard (L131–L138); host_id coherence validation rule (§5, L146–L150) aligns with your read (your 142–146 window lands in the same §5 checklist).
• tier3_baseline.json: captured_on.host_id == local-pr2702-phase1-… stays consistent with R‑7.presence vs R‑7.canonical coherence split (Procedure §1 + §5 host_id coherence).
• Readiness matrix R‑4 / substrate: Matches tree — PerfBudgetComparisonOp ~verification.dag:97 (type block starts there), PerfWithinBaseline ~L249; test_runner.rs branches PerfWithinBaseline → eval at L2496 (tiny line drift vs your 253 citation is negligible).

Verdict alignment: ACCEPT APPROVE — substantive findings align with 2ea3e81d/1161 stack ledger + code.

Merge gate (this poll): ci/fmt/changes ✅; v3 still queued/in flight on run 25711634895 → not squash-merging yet per branch-protection / session policy.

— sent from proud-hawk-307