Pi mutation-scope integration - #278
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davidabram
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September 11, 2026 18:48
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Define the stacked Pi 0.80.6 integration across lifecycle evidence, confirmation-required protocol semantics, the Rust adapter, conservative recovery, extension wiring, and production regressions. Preserve false-positive safety while reusing the existing mutation-scope runtime without schema migrations. Plan: pi-mutation-scope-integration; Tasks: T01-T06
Record reproducible captures and probe plugins for the pinned Pi 0.80.6 runtime so lifecycle, blocking, failure, ordering, signal, session, and mutation behavior can be reviewed before implementation. Update the integration plan to mark T01 complete and preserve the two design corrections discovered during probing. Plan: pi-mutation-scope-integration.md (T01) Co-authored-by: SCE <sce@crocoder.dev>
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Prevent denied Pi tool calls from being treated as confirmed at unrelated mutation boundaries. Apply the confirmation rule across the Rust and Quint protocols, extend MBT fixtures and scenarios, add recovery coverage, and fix Scope6 exclusive attribution; record the completed plan task. Plan: pi-mutation-scope-integration, task T02 Co-authored-by: SCE <sce@crocoder.dev>
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Track Pi's bash, edit, and write tool lifecycles through the mutation-scope runtime with durable attempt state, fail-closed admission, terminal cleanup, and provenance. Add the hidden Pi ingress and a harness-neutral external mutation supervisor that keeps the worktree lock held across a spawned shell, streams status, handles explicit cancellation, and recovers or clears taint only after shell termination. Document the lifecycle contract and supervisor design across the shared context surfaces. Plan: pi-mutation-scope-integration, task T03 Co-authored-by: SCE <sce@crocoder.dev>
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Preserve Pi's actual user_bash execution context while keeping guard containment fail-closed. Validate the requested cwd within the canonical worktree, mirror pinned Pi shell resolution, and drain reader threads to EOF before delivering queued output. Update the lifecycle documentation, ADR follow-up, and T03 plan evidence with contract citations and regression coverage. Plan: pi-mutation-scope-integration (T03) Co-authored-by: SCE <sce@crocoder.dev>
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Recover orphaned PendingStart attempts only when the recorded Pi owner is positively dead, using PID liveness and Linux process start-time checks to avoid TTL- or sweep-based false positives. Route stale-owner admission through the existing flush/abandon/flush recovery sequence, and add regression coverage for duplicate events, sibling isolation, interrupted recovery, external-guard reconciliation, and lock contention. Update the Pi integration context and plan to record the D10 implementation, its conservative tradeoffs, and verification results. Plan: pi-mutation-scope-integration, task T04 Co-authored-by: SCE <sce@crocoder.dev>
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…egration Add fail-closed tracked-tool lifecycle forwarding, terminal retry and recovery with explicit ToolExecutionAbandon handling, and supervisor-backed user_bash operations. Cover the extension and Rust adapter behavior with Bun and Rust tests, including Windows refusal and unresolved terminal delivery cases. Update plan `pi-mutation-scope-integration` for T05 and T06 to record the ordinary Pi integration path and accepted extension-order limitation. Co-authored-by: SCE <sce@crocoder.dev>
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Expand production-path coverage for Pi mutation scopes across confirmed, failed, rejected, concurrent, and stale-process executions, including cross-harness guard races and post-recovery behavior. Replay pinned Pi captures through the real extension handlers against temporary Git repositories, and document the Linux/Windows test dispositions and competing-extension limitation. This test-only change validates session and model provenance, conservative exclusion of ambiguous writes, guard recovery, and continued fresh-work attribution without changing production behavior, schemas, or migrations. Ref: context/plans/pi-mutation-scope-integration.md (T06) Co-authored-by: SCE <sce@crocoder.dev>
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Add a credential-free end-to-end smoke that builds the current CLI, installs the real Pi extension through setup, and drives an SDK session with a faux provider through normal extension discovery and tool dispatch. Record durable Agent Trace evidence for bash attribution and session/model provenance while distinguishing runtime execution from capture-replay coverage. Plan: pi-mutation-scope-integration (T06) Co-authored-by: SCE <sce@crocoder.dev>
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Pin the Quint runner seed so generated mutation traces are reproducible across runs. Co-authored-by: SCE <sce@crocoder.dev>
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