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phase2: close out — all SPEC §5 exit criteria met

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20 audited attempts, 0 shipped false accepts, 3 verified auto-accepted
wins (tokei class-5: +10.7%, +3.7%, +9.9%; ~1.25x vs upstream with
Phase-0 wins). Independent 20-way adversarial re-audit (phase2-final-audit
workflow) confirmed every verdict follows its evidence, correct
equivalence tier, no harness-gaming, ledger append-only intact.

Closeout changes:
- case study: full 20-row attempt table, scoreboard, corrected
  comrak-010 CI upper bound (+12.1%, was +12.2%), exit-criteria section
  flipped to ALL MET, OS-isolation gap marked closed.
- CLAUDE.md Current-phase line: Phase 2 complete, next Phase 3.
- verdict: derive the ledger 'phase' column from the run_id namespace
  (phaseN-*) instead of the hardcoded 1 the re-audit flagged; historical
  rows are immutable and stay as written (run_id prefix is authoritative).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EcKPWQ3MQD4NdEHwar96u2
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Claude
2026-07-11 17:47:37 +00:00
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@@ -32,7 +32,7 @@ Full engineering spec: `SPEC.md`. Read it before starting any phase.
## Current phase
**Phase 2 in progress — agent loop.** The unattended profile→hypothesize→patch→gated-verdict loop runs on comrak via the Claude Agent SDK (`agent/hotpath_agent/loop.py`, model claude-fable-5) over a stdio MCP server wrapping the seven harness tools. 3 audited attempts (phase2-comrak-001/002/003), all honest rejections, **0 false accepts**; the agent twice refused to fabricate an unreadable verdict (results/phase2/case-study-agent-loop.md). Shipped: async run_verdict + pollable read_verdict, windowed read_target_source. Exit-criteria gaps: an auto-accepted win (needs richer profiling to unlock more classes), and OS-level process/user isolation for the agent's tool boundary (SPEC §10; the SDK allow/deny layer is defense-in-depth only — see docs/infra.md). (Update this line as phases complete; exit criteria in SPEC.md §5.)
**Phase 2 COMPLETE — all SPEC §5 exit criteria met.** The unattended profile→hypothesize→patch→gated-verdict loop ran on comrak *and* tokei via the Claude Agent SDK (`agent/hotpath_agent/loop.py`, model claude-fable-5) over a stdio MCP server wrapping the seven harness tools, behind OS-level isolation (`scripts/agent-isolated.sh` mountns/user modes, `just isolation-check` 19/19). **20 audited attempts, 0 shipped false accepts, 3 verified auto-accepted wins** — all tokei, class 5 (phase2-tokei-001 +10.7%, -003 +3.7%, -008 +9.9%; compounded ~1.25× vs upstream v14.0.0 with the Phase-0 wins), each fuzz-clean (`scripts/diff-fuzz-*.py`, 10k inputs) and ASan/LSan-clean. One pipeline accept (phase2-comrak-010, a `ManuallyDrop` teardown skip) was **overturned by the 100% human audit** on a LeakSanitizer flag before shipping; the fix made `verdict` run ASan/LSan on every would-be accept and cap flagged wins at needs-human-review (SPEC §8). Every row re-audited twice — incrementally during the grind, then a 20-way adversarial refute-the-verdict fan-out (`phase2-final-audit` workflow): all confirmed, no gaming, ledger append-only intact. Case study: results/phase2/case-study-agent-loop.md. **Next: Phase 3** (playbook classes 3–7, coz, C/C++ targets, 3–5 public case studies — SPEC.md §5).
## Commands