Distillation

Date: Sep 15, 2026

• 🔴 [requested-audit] (16:32) User requested a read-only adversarial correctness audit of the CURRENT dirty worktree in /home/byk/Code/opencode, scoped only to the V2 interrupted-session recovery feature and current uncommitted fixes.
• 🔴 [enforced-read-only-workflow] (16:32) User directed the audit not to edit files, run tests, build, commit, or touch services, and to review actual source and tests rather than summaries.
• 🟡 (16:32) User asked the audit to check: lease expiry/renewal/takeover; stale-owner dispatch and durable-write fencing; ordinary acquisition behavior; cancellation and successor wake ordering; exact recovery wake/outbox liveness; normal wake_pending semantics including retries and resume:false; recovery batch isolation; malformed phase handling; newest-assistant supersession; cross-session IDs; compaction atomicity; migration SQL/generated schema; whether tests truly reach failure conditions; and current Effect APIs against nearby source as needed.
• 🔴 [requested-evidence] (16:32) User required findings ordered by severity, with exact file:line evidence and a concrete failure sequence.
• 🔴 (16:32) User directed that if no findings exist, the response must say PASS and list residual risks/testing gaps.
• 🔴 (16:32) User explicitly prohibited a merge verdict because this is a pre-freeze audit.
• 🔴 (16:32) User stated: Replace <platform> with your platform, for example darwin-arm64 or linux-x64; the standalone executable path is ./packages/opencode/dist/opencode-<platform>/bin/opencode.
• 🟡 (16:32) Repository guidance in /home/byk/Code/opencode/CONTRIBUTING.md identifies Bun 1.3+ as required, packages/opencode as core business logic/server, and says API or SDK changes such as packages/opencode/src/server/server.ts require running ./script/generate.ts.
• 🟡 (16:32) Root /home/byk/Code/opencode/package.json specifies packageManager: bun@1.3.14, effect: 4.0.0-beta.83, @effect/opentelemetry: 4.0.0-beta.83, @effect/platform-node: 4.0.0-beta.83, @effect/sql-sqlite-bun: 4.0.0-beta.83, and a root test script that prints do not run tests from root and exits 1.
• 🟡 (16:33) The dirty worktree contained 29 changed paths totaling 2,149 insertions and 524 deletions. Modified paths: .lore.md, AGENTS.md, packages/core/schema.json, packages/core/src/database/migration.gen.ts, packages/core/src/database/migration/20260914170650_session-recovery.ts, packages/core/src/database/schema.gen.ts, packages/core/src/session.ts, packages/core/src/session/compaction.ts, packages/core/src/session/context-epoch.ts, packages/core/src/session/execution/local.ts, packages/core/src/session/input.ts, packages/core/src/session/message-updater.ts, packages/core/src/session/projector.ts, packages/core/src/session/recovery.ts, packages/core/src/session/run-coordinator.ts, packages/core/src/session/runner/index.ts, packages/core/src/session/runner/llm.ts, packages/core/src/session/runner/publish-llm-event.ts, packages/core/src/session/sql.ts, packages/core/test/database-migration.test.ts, packages/core/test/session-execution-local.test.ts, packages/core/test/session-projector.test.ts, packages/core/test/session-prompt.test.ts, packages/core/test/session-runner-recorded.test.ts, packages/core/test/session-runner-tool-events.test.ts, packages/core/test/session-runner.test.ts, and packages/schema/src/session-event.ts.
• 🟡 (16:33) Deleted paths were packages/core/src/database/migration/20260914214636_session-execution.ts and packages/core/src/database/migration/20260914222526_session-execution-phase.ts; untracked paths were packages/core/src/session/execution/claim.ts, packages/core/src/session/recovery-id.ts, perf.data, and perf.data.old.
• 🟡 (16:33) /home/byk/Code/opencode/packages/core/package.json defines test as bun test --only-failures, typecheck as tsgo --noEmit, and depends on effect: catalog: corresponding to root catalog version 4.0.0-beta.83.
• 🔴 (16:33) User stated that an expired execution claim never renews itself.
• 🟡 (16:33) packages/core/src/session/execution/claim.ts:25-31 fences claim operations by session_id, execution id, owner_id, and expires_at > now; update() at lines 38-52 renews to now + SESSION_EXECUTION_LEASE_MS or dies with SessionExecutionClaim.Lost, while clear() at lines 54-63 applies the same live-claim predicate before deletion.
• 🟡 (16:33) packages/core/src/session/execution/claim.ts:33-37 documents that lease timestamps use node wall clocks, the lease interval must exceed maximum deployment clock skew plus one renewal interval, execution IDs fence a node immediately after takeover, and an expired claim never renews itself.
• 🟡 (16:33) packages/core/src/session/execution/claim.ts:65-66 defines transaction() as an immediate database transaction that first calls update(db, claim) and then executes the supplied Effect, with defects converted through Effect.orDie.
• 🟡 (16:33) packages/core/src/session/execution/local.ts:24-25 creates a process-local ownerID using crypto.randomUUID() and derives leaseDuration from SESSION_EXECUTION_LEASE_MS.
• 🟡 (16:33) packages/core/src/session/execution/local.ts:28-47 ordinary acquisition creates a new executionID, inserts a "ready" SessionExecutionTable row with lease expiry, uses .onConflictDoNothing(), and returns without running when no row is claimed.
• 🟡 (16:33) packages/core/src/session/execution/local.ts:48-55 selects the oldest recovery row for the session where wake_pending=true, ordered by time_created then execution_id, and passes its continuation_message_id to the runner.
• 🟡 (16:33) packages/core/src/session/execution/local.ts:56-60 races input.run(claim, force, recovery?.continuationMessageID) against repeated lease renewal via SessionExecutionClaim.update(db, claim) on Schedule.spaced(Duration.millis(leaseDuration / 3)).
• 🟡 (16:33) packages/core/src/session/execution/local.ts:67-89 removes the matching active claim on exit; clears the live claim after success; does not clear on interrupt; and after other failures reads the execution phase and clears unless the row is missing or phase is "unknown".
• 🟡 (16:33) packages/core/src/session/execution/local.ts:96-109 interruption clears the active claim before coordinator interruption; SessionExecutionClaim.Lost defects are ignored, while other defects remain fatal.
• 🟡 (16:33) packages/core/src/session/sql.ts:176-200 defines session_recovery with composite primary key (session_id, assistant_message_id), unique execution_id, unique continuation_message_id, wake_pending defaulting to true, and foreign keys to session, session_message, and session_input.
• 🟡 (16:33) packages/core/src/session/sql.ts:202-225 defines session_execution with primary key id, unique session_id, owner_id, optional assistant_message_id, phases "ready" | "safe" | "unknown", expires_at, optional recovery_error, a SQL phase check, and SESSION_EXECUTION_LEASE_MS = 30_000.
• 🟡 (16:34) packages/core/src/session/recovery.ts:21-22 sets recovery BATCH_SIZE = 100 and runtime-valid phases to "ready", "safe", and "unknown".
• 🟡 (16:34) packages/core/src/session/recovery.ts:24-37 scans up to 100 expired execution rows with recovery_error IS NULL, ordered by time_created then id.
• 🟡 (16:34) packages/core/src/session/recovery.ts:42-59 attempts takeover by changing owner_id and renewing the lease only when execution id, session_id, old owner_id, expiry <= now, and null recovery_error all still match.
• 🟡 (16:34) packages/core/src/session/recovery.ts:60-79 quarantines malformed phases by setting recovery_error to Invalid execution phase: ${String(claim.phase)} under the new owner and live lease; failure to retain that claim dies with Recovery execution claim changed: ${claim.id}.
• 🟡 (16:34) packages/core/src/session/recovery.ts:80-94 loads the newest assistant message by descending seq; a "safe" execution or a claim whose non-null assistant_message_id differs from the newest assistant is cleared without publishing recovery.
• 🟡 (16:34) packages/core/src/session/recovery.ts:95-127 publishes SessionEvent.Step.Recovered with sessionID, timestamp, executionID, optional assistantMessageID, and phase; its commit callback clears the claim. A publication defect is suppressed only if a matching session_recovery row already exists.
• 🟡 (16:34) packages/core/src/session/recovery.ts:128-136 catches and logs each claim’s cause independently and processes claims sequentially with { discard: true, concurrency: 1 }.
• 🟡 (16:34) packages/core/src/session/recovery.ts:138-164 selects up to 100 pending recovery rows ordered by time_created and execution_id; it wakes the session only when continuationMessageID === continuation(executionID), otherwise logs Invalid recovery continuation identity, and catches/logs each redrive failure independently.
• 🟡 (16:34) packages/core/src/session/recovery.ts:166-186 separately selects up to 100 sessions having ordinary session_input rows with wake_pending=true and promoted_seq IS NULL, orders them by minimum time_created then session_id, and sequentially calls execution.wake(sessionID) with per-session failure logging.
• 🟡 (16:34) packages/core/src/session/recovery.ts:189-202 starts recovery as a scoped background fiber and repeats it every 10 seconds; top-level failures are logged as Failed to recover Sessions.