Distillation

Date: Sep 15, 2026

• 🟡 (19:20) Inspected /home/byk/Code/opencode/packages/core/src/event.ts: remove() transactionally deletes EventSequenceTable then EventTable; claim() updates owner_id; readAfter(aggregateID, after) reads events where seq > after ordered ascending and decodes them; subscribeDurable() begins with a sliding PubSub wake channel of capacity 1.
• 🟡 (19:21) Inspected /home/byk/Code/opencode/packages/core/src/session.ts: events() exposes events.durable({ aggregateID: input.sessionID, after: input.after }); history() calls EventV2.readAggregate() with manifest: SessionDurable; prompt() admits input through SessionInput.admit() and calls execution.wake(admitted.sessionID) unless input.resume === false.
• 🟡 (19:21) Search found SessionEvent.Step.Interrupted in /home/byk/Code/opencode/packages/schema/src/session-event.ts at lines 196, 205, 484, and 517.
• 🟡 (19:22) Reviewed migration chain: 20260914170650_session-recovery creates session_recovery with composite primary key (session_id, assistant_message_id) and a unique continuation_message_id; 20260914214636_session-execution creates session_execution, adds execution_id to session_recovery, and adds unique/session-owner indexes; 20260914222526_session-execution-phase adds required text column phase to session_execution. All three were registered in packages/core/src/database/migration.gen.ts.
• 🟡 (19:23) Confirmed /home/byk/Code/opencode/packages/core/package.json identifies @opencode-ai/core version 1.18.30; scripts include "test": "bun test --only-failures" and "typecheck": "tsgo --noEmit"; exports include "./session/runner": "./src/session/runner/index.ts" and wildcard "./*": "./src/*.ts".
• 🔴 (19:27) User stated the execution-lease invariant: an expired claim “never renews itself.”
• 🟡 (19:27) Inspected /home/byk/Code/opencode/packages/core/src/session/execution/claim.ts: claim fencing matches session_id, execution id, owner_id, and requires expires_at > now; update() extends expiry to now + SESSION_EXECUTION_LEASE_MS; clear() deletes only a still-valid matching claim; both die with SessionExecutionClaim.Lost if no row is returned; transaction() uses an immediate database transaction and renews before running the supplied effect.
• 🟡 (19:28) Confirmed migration behavior in /home/byk/Code/opencode/packages/core/src/database/migration.ts: apply() rejects a nonempty database lacking a session table; fresh databases apply schema.gen.ts and mark every TypeScript migration complete; applyOnly() seeds the new migration journal from __drizzle_migrations, supports both named entries and timestamp-prefix matching, and applies each incomplete migration transactionally.
• 🟡 (19:30) Working tree included modifications across .lore.md, AGENTS.md, packages/core/schema.json, migration/schema files, session execution/recovery/projector/runner files, and related tests; untracked files were packages/core/src/session/execution/claim.ts, packages/core/src/session/recovery-id.ts, perf.data, and perf.data.old.
• 🟡 (19:31) Added packages/core/src/database/migration/20260915193000_session-recovery-fencing.ts, updated packages/core/src/database/migration.gen.ts and packages/core/src/database/migration/20260914170650_session-recovery.ts, and restored/updated packages/core/src/database/migration/20260914214636_session-execution.ts plus packages/core/src/database/migration/20260914222526_session-execution-phase.ts.
• 🔴 [enforced-workflow] (19:33) User stated package tests must never be run from the repository root; run them from the relevant package directory, such as packages/core.
• 🔴 (19:33) User’s Effect-code convention is to verify APIs against current Effect v4 / effect-smol source under .opencode/references/effect-smol and nearby repository code, rather than relying on older Effect v2/v3 examples or memory.
• 🟡 (19:33) Effect implementation/testing guidance loaded: use Effect.gen(function* () { ... }) for multi-step workflows; Effect.fn("Name") or Effect.fnUntraced(...) for named effects; Effect Schema, branded IDs, and Schema.TaggedErrorClass for domain modeling; explicit layers; no any, non-null assertions, unchecked casts, or obsolete APIs; testEffect(...) for Effect services and it.live(...) for live platform behavior; use scoped fixtures/finalizers.
• 🟡 (19:38) Confirmed precedent for schema-introspection migrations using PRAGMA table_info(...) in packages/core/src/database/migration/20260915193000_session-recovery-fencing.ts, 20260410174513_workspace-name.ts, and 20260511173437_session-metadata.ts.
• 🟡 (19:39) Updated packages/core/src/session/projector.ts and packages/core/src/session/runner/llm.ts as part of recovery/fencing integration.
• 🟡 (19:40) Reviewed recovery flow in packages/core/src/session/recovery.ts: scans SessionExecutionTable; discards a claim when its non-null assistant_message_id is not the latest assistant message; publishes SessionEvent.Step.Recovered with generated recovery/continuation IDs, prompt "continue", delivery "queue", and restart-specific error text; commit conditionally deletes the unchanged execution row by id, session_id, phase, and assistant-message identity; duplicate recovery is detected through SessionRecoveryTable; successful recovery calls execution.wake(claim.session_id).
• 🟡 (19:42) Confirmed packages/core/src/session/execution.ts service contract: active, resume(sessionID), wake(sessionID), and interrupt(sessionID); noopLayer supplies no-op compatibility implementations for callers needing only durable session recording.
• 🟡 (19:43) Updated packages/core/src/database/migration/20260915193000_session-recovery-fencing.ts.
• 🔴 [requested-tests] (19:45) Migration coverage was added in packages/core/test/database-migration.test.ts for upgrading populated recovery ownership tables to the final schema.
• 🟡 (19:47) The migration test preserves existing rows ses_existing, msg_existing, and msg_input; verifies session_execution.id is required; session_input.wake_pending defaults to false; session_recovery.execution_id is required and primary-keyed; assistant_message_id is nullable; phase is required; recovery_error is nullable; and inserting invalid execution phase "invalid" fails.
• 🟡 (19:49) Updated packages/core/test/database-migration.test.ts again after reviewing the populated-upgrade assertions.
• 🔴 [requested-tests] (19:50) Added recovery/projector coverage in packages/core/test/session-projector.test.ts.
• 🟡 (19:51) Initial package test run failed exactly 1 test: SessionProjector > atomically reconciles one abandoned execution into one continuation; totals were 185 pass, 1 fail, 533 expect() calls across 186 tests in 7 files. Failure was SessionInput.LifecycleConflict for ID msg_recovery_continue_execution at packages/core/src/session/input.ts:141, reached through SessionInput.projectAdmitted in packages/core/src/session/projector.ts:414.
• 🟡 (19:51) Debugging identified that recovery projection attempted to admit a continuation whose message ID already existed in SessionMessageTable, triggering the lifecycle-conflict guard in SessionInput.admit.
• 🟡 (19:54) Fixed the recovery projection handling in packages/core/src/session/projector.ts after the duplicate continuation-message lifecycle conflict.
• 🟡 (19:56) Re-running the package tests succeeded: 186 pass, 0 fail, 535 expect() calls across 7 files in 15.32 seconds.
• 🟡 (19:57) tsgo --noEmit completed successfully.
• 🟡 (19:59) A second tsgo --noEmit completed successfully.
• 🟡 (20:01) Reviewed packages/core/script/migration.ts: --check verifies no incremental schema migration is pending, schema.gen.ts matches a regenerated full schema, and migration.gen.ts matches sorted TypeScript migration files; stale-state errors instruct running bun script/migration.ts from packages/core; Drizzle commands explicitly use .cwd(path.join(root, "packages/core")).
• 🟡 (20:03) Migration consistency check succeeded: Drizzle reported “No schema changes, nothing to migrate” for the incremental comparison and successfully generated the temporary full-schema migration at /tmp/opencode-core-migration-check-kktghk/full/20260915200156_schema/migration.sql.