Distillation

Date: Sep 15, 2026

• 🔴 (14:42) User directed implementation of the complete revised V2 interrupted-session recovery ownership protocol in /home/byk/Code/opencode, using the current dirty worktree and producing code plus tests rather than research.
• 🔴 (14:42) User stated the implementation baseline is commit dc661f30cb plus current uncommitted lease/fencing changes, and that 2 frozen reviews returned DO-NOT-MERGE.
• 🔴 (14:42) User required the smallest coherent design addressing all findings, rather than scattered workarounds.
• 🔴 [enforced-workflow] (14:42) User required edits via apply_patch, use of the Effect v4 skill/source, and compliance with repository AGENTS rules.
• 🔴 (14:42) User required preserving unrelated AGENTS.md, perf.data, and perf.data.old.
• 🔴 (14:42) User prohibited committing, starting/restarting any live service, building SEA, or running broad package validation.
• 🔴 (14:42) User required startup recovery to create a fresh synthetic queued continue Step after model-visible reconciliation.
• 🔴 (14:42) User directed: “Never replay prior provider/tool calls.”
• 🔴 (14:42) User directed: “Never call SessionPrompt.”
• 🔴 (14:42) User directed: “Never recover an older assistant projection.”
• 🔴 (14:42) User required ordinary acquisition/wake to never overwrite any expired claim.
• 🔴 (14:42) User required expired ready/unknown claims to reconcile before replacement; safe claims may be discarded only by recovery ownership, never ordinary acquisition.
• 🔴 (14:42) User required durable recovery wake so a crash after recovery event/input admission but before advisory wake is redriven, targeting only the synthetic recovery continuation.
• 🔴 (14:42) User directed durable recovery redrive to “never promote unrelated admit-only inputs” and prohibited broadly scanning all pending inputs; durable outbox/state may be added if needed.
• 🔴 (14:42) User required lease renewal to evaluate current time on every heartbeat.
• 🔴 (14:42) User required every renew, phase mutation, event commit, promotion/context mutation, and immediate provider/tool/compaction dispatch check to match session+execution+owner/fence as appropriate, require an unexpired lease, and affect exactly 1 row.
• 🔴 (14:42) User required that a stale owner never renew after expiry and allowed threading owner ID as needed.
• 🔴 (14:42) User acknowledged an unavoidable instruction-level race around external calls but required narrowing it to a synchronous immediate checked boundary without speculative infrastructure.
• 🔴 [requested-tests] (14:42) User required tests that pause a stale owner, expire/reconcile/take over, resume the stale owner, and prove no provider/tool side effect or durable event occurs.
• 🔴 (14:42) User required explicit user cancellation to atomically settle/delete the exact claim with Step.Interrupted; later owner-scoped cleanup must never delete a successor claim, execution ID must be threaded through clear, and the successor wake race must be eliminated.
• 🔴 (14:42) User required automatic and overflow compaction to transition to safe only in the durable Compaction.Ended commit, never after stream completion but before the event.
• 🔴 (14:42) User required deterministic bounded recovery scans with per-row isolation/quarantine so one malformed row cannot block other rows.
• 🔴 (14:42) User required a DB CHECK for execution phase in fresh schema, boundary decoding/handling for old corruption, and correction of generated schema metadata showing primary-key id nullable if applicable.
• 🔴 (14:42) User required Step.Recovered replay to prevent cross-session recoveryMessageID/assistantMessageID relationships, preferring canonical derivation/equality and transactional validation that rows belong to the same session.
• 🔴 (14:42) User required fixing lease migration upgrade against a populated immediately preceding schema; because the work is unreleased 0-to-1, the 4 unpublished recovery migrations may be edited/squashed, with generated schema/migration artifacts kept consistent and no compatibility requirement for databases from the unpublished intermediate commit.
• 🔴 (14:42) User required documenting the bounded wall-clock-skew assumption if leases remain and guaranteeing a node with expired ownership cannot revive.
• 🔴 (14:42) User required deterministic tests without fixed sleeps except genuine lease timing.
• 🔴 (14:42) User required Core to remain independent of Server and EventV2 owner claims to remain separate.
• 🔴 (14:42) User enumerated 9 exact review findings to close: 1. fixed heartbeat expiry; 2. expired runner revival; 3. acquisition bypasses recovery; 4. cancellation not atomic and owner-wide clear deletes successor; 5. automatic compaction safe too early; 6. recovery wake loss and admit-only leakage; 7. populated migration failure; 8. malformed phase poisons unbounded scan; 9. cross-session recovery replay identity.
• 🔴 (14:42) User additionally required fencing failInterruptedTools, SessionInput promotions, and SessionContextEpoch updates under execution ownership.
• 🔴 [requested-tests] (14:42) User requested deterministic failing-first-style regressions in this order: 1. heartbeat advancement; 2. expiry no revival; 3. stale owner resumed after takeover; 4. acquisition refusing expired uncertain claim; 5. exact recovery redrive after lost wake; 6. admit-only isolation; 7. cancellation crash/successor race; 8. automatic compaction crash window; 9. populated migration upgrade if relevant; 10. malformed claim isolation/bounds; 11. cross-session recovery IDs; 12. all provider/tool/publication/promotion/context fences.
• 🔴 (14:42) User stated the pre-change test baseline was 112 focused tests and 1108 full Core tests.
• 🔴 [enforced-workflow] (14:42) User required affected tests to run from packages/core with --printConsoleTrace, followed by bun typecheck; tests must not run from repository root.
• 🔴 (14:42) User requested the final response contain only a substantive summary of design, exact files changed, commands/tests and results, unresolved risks, and blockers, with no commit.
• 🟡 (15:25) Updated packages/core/src/session/sql.ts.
• 🟡 (15:26) Generated a temporary Drizzle schema migration under /tmp/opencode/core-drizzle/20260915152553_schema/migration.sql; its session_execution table had id text PRIMARY KEY, phase text NOT NULL, and CONSTRAINT "session_execution_phase_check" CHECK("phase" IN ('ready', 'safe', 'unknown')).
• 🟡 (15:26) Updated packages/core/src/session/sql.ts again to correct generated primary-key nullability metadata.
• 🟡 (15:26) Regenerated /tmp/opencode/core-drizzle/20260915152630_schema/migration.sql; session_execution.id became text NOT NULL with explicit CONSTRAINT session_execution_pk PRIMARY KEY(id), while retaining session_execution_phase_check for ready, safe, and unknown.
• 🟡 (15:27) Compared generated snapshot metadata: session_execution.id.notNull changed from false to true, and session_execution_pk changed from an implicit to an explicit named primary key.
• 🟡 (15:28) Updated packages/core/schema.json, packages/core/src/database/schema.gen.ts, and packages/core/src/database/migration/20260914170650_session-recovery.ts to align generated schema and the squashed recovery migration with the explicit non-null session_execution primary key and phase constraint.
• 🟡 (15:28) Corrected an unintended unrelated schema.json nullability difference so the intended generated-schema delta remained focused.
• 🟡 (15:29) Inspected ownership-sensitive code paths in packages/core/src/session/execution/claim.ts, packages/core/src/session/execution/local.ts, packages/core/src/session/sql.ts, packages/core/src/session/projector.ts, and packages/core/src/session/recovery.ts.
• 🟡 (15:29) packages/core/src/session/execution/claim.ts ownership predicates match SessionExecutionTable.session_id, .id, .owner_id, and require expires_at > now; updates renew to now + SESSION_EXECUTION_LEASE_MS, and clear deletes the exact matched claim.
• 🟡 (15:29) Inspected SessionEvent.Step.Recovered projection in packages/core/src/session/projector.ts: it derives recovery and continuation IDs from executionID, validates the latest assistant within event.data.sessionID, admits a queued synthetic prompt Prompt.make({ text: "continue" }), runs event projection, and inserts SessionRecoveryTable with wake_pending: true.
• 🟡 (15:29) Updated packages/core/src/session/projector.ts to strengthen recovery replay identity/session validation.
• 🟡 (15:30) Migration consistency check reported “No schema changes, nothing to migrate” for the incremental configuration and successfully generated a full migration at /tmp/opencode-core-migration-check-1drTZO/full/20260915152958_schema/migration.sql.
• 🟡 (15:30) Current recovery-related worktree included modified generated artifacts and implementation/tests, deleted unpublished migrations packages/core/src/database/migration/20260914214636_session-execution.ts and packages/core/src/database/migration/20260914222526_session-execution-phase.ts, and new files packages/core/src/session/execution/claim.ts and packages/core/src/session/recovery-id.ts; unrelated perf.data and perf.data.old remained untracked.
• 🟡 (15:30) Inspected packages/core/src/session/execution/local.ts: ordinary acquisition inserts SessionExecutionTable with onConflictDoNothing() rather than replacing a claim; claims carry { sessionID, executionID, ownerID }; heartbeat calls SessionExecutionClaim.update(db, claim) on a schedule; success clears the exact claim; failure cleanup checks the same session/execution/owner; interruption cleanup uses the active exact claim.
• 🟡 (15:30) Inspected packages/core/src/session/run-coordinator.ts: per-key entries track pendingWake and stopping; wakes coalesce; interruption marks stopping, interrupts the owner, performs cleanup, and only then creates a pending successor.
• 🟡 (15:30) Updated packages/core/src/session/run-coordinator.ts to further tighten interruption cleanup and successor wake ordering.
• 🟡 (15:31) Inspected packages/core/src/session/recovery.ts: BATCH_SIZE = 100; expired claims are selected deterministically by time_created then id; each is taken over only by matching id/session/prior owner/expiry; phase is decoded against ready | safe | unknown; malformed phases are quarantined in recovery_error; safe or superseded assistant claims are cleared; uncertain claims publish SessionEvent.Step.Recovered with exact-claim clear in the durable commit.
• 🟡 (15:31) Recovery wake redrive scans only SessionRecoveryTable.wake_pending = true, orders by time_created then execution_id, limits to BATCH_SIZE, validates continuation_message_id === continuation(execution_id), and invokes execution.wake(sessionID) with per-row error isolation.
• 🟡 (15:31) Confirmed Effect v4 source references for schema-error handling under /home/byk/.local/share/opencode/repos/github.com/Effect-TS/effect-smol/packages/effect/src/Schema.ts, SchemaError.ts, and SchemaIssue.ts.
• 🟡 (15:32) Full Core test run passed: 1124 tests, 0 failures, and 3088 expect() calls across 145 files in 61.93s. Expected console logging included a mocked skill download StatusCodeError and normal watcher/project-copy/location-service logs.
• 🟡 (15:33) Ran tsgo --noEmit; it completed without errors.
• 🟡 (15:33) Searched runner call sites and confirmed claim threading through packages/core/src/session/execution/local.ts, packages/core/test/session-runner.test.ts, and packages/core/test/session-runner-recorded.test.ts, including executionID, ownerID, and optional recoveryInputID.
• 🟡 (15:34) Located createLLMEventPublisher use in packages/core/src/session/runner/llm.ts and its test construction in packages/core/test/session-runner-tool-events.test.ts.
• 🟡 (15:35) Updated packages/core/src/session/runner/llm.ts after reviewing immediate provider/tool/publication fencing paths.