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feat(core): make path-local instruction discovery durable

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Replace synthetic-message instruction injection with a durable
discovery projection so discovered AGENTS.md files survive compaction,
forks, reverts, and restarts.

- Add the instruction_file table and the durable
  session.instructions.discovered event; projection stores each
  discovered path and content with its owning assistant-message
  boundary and durable discovery order.
- Fold discovered files into the core/instructions source through
  InstructionDiscovery, absorbing SessionInstructions. Completed
  compaction rebaselines restate discovered instructions instead of
  summarizing them away.
- Re-read discovered files live at each observation so mid-session
  edits reach the model; the frozen discovery content stands in only
  when a file becomes unreadable.
- Narrate instruction file changes as per-file deltas via diffByKey,
  restating the full set only for pure reorderings.
- Fork copies discoveries within the inherited transcript, committed
  revert removes discoveries past the revert boundary, and Session
  movement clears them so the destination initializes a complete
  baseline.
This commit is contained in:
Kit Langton 2026-07-06 14:22:53 -04:00
commit 0726f09b05
28 changed files with 1166 additions and 598 deletions
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4
packages/sdk/js/script/build.ts
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@ -60,7 +60,7 @@ if (schemas) {
visit({ ...document, components: { ...document.components, schemas: undefined } })
for (const name of Object.keys(schemas)) {
if (
/^(SessionAgentSelected|SessionModelSelected|SessionMoved|SessionRenamed|SessionForked|SessionPromptPromoted|SessionPromptAdmitted|SessionExecutionSettled|SessionInstructionsUpdated|SessionSynthetic|SessionSkillActivated|SessionShellStarted|SessionShellEnded|SessionStepStarted|SessionStepEnded|SessionStepFailed|SessionTextStarted|SessionTextDelta|SessionTextEnded|SessionToolInputStarted|SessionToolInputDelta|SessionToolInputEnded|SessionToolCalled|SessionToolProgress|SessionToolSuccess|SessionToolFailed|SessionRetried|SessionCompactionStarted|SessionCompactionDelta|SessionCompactionEnded|SessionRevertStaged|SessionRevertCleared|SessionRevertCommitted)1$/.test(
/^(SessionAgentSelected|SessionModelSelected|SessionMoved|SessionRenamed|SessionForked|SessionPromptPromoted|SessionPromptAdmitted|SessionExecutionSettled|SessionInstructionsUpdated|SessionInstructionsDiscovered|SessionSynthetic|SessionSkillActivated|SessionShellStarted|SessionShellEnded|SessionStepStarted|SessionStepEnded|SessionStepFailed|SessionTextStarted|SessionTextDelta|SessionTextEnded|SessionToolInputStarted|SessionToolInputDelta|SessionToolInputEnded|SessionToolCalled|SessionToolProgress|SessionToolSuccess|SessionToolFailed|SessionRetried|SessionCompactionStarted|SessionCompactionDelta|SessionCompactionEnded|SessionRevertStaged|SessionRevertCleared|SessionRevertCommitted)1$/.test(
name,
) &&
!reachable.has(name)
@ -100,7 +100,7 @@ await createClient({
const generatedTypesPath = "./src/v2/gen/types.gen.ts"
const generatedTypes = await Bun.file(generatedTypesPath).text()
if (
/export type (SessionAgentSelected|SessionModelSelected|SessionMoved|SessionRenamed|SessionForked|SessionPromptPromoted|SessionPromptAdmitted|SessionExecutionSettled|SessionInstructionsUpdated|SessionSynthetic|SessionSkillActivated|SessionShellStarted|SessionShellEnded|SessionStepStarted|SessionStepEnded|SessionStepFailed|SessionTextStarted|SessionTextDelta|SessionTextEnded|SessionToolInputStarted|SessionToolInputDelta|SessionToolInputEnded|SessionToolCalled|SessionToolProgress|SessionToolSuccess|SessionToolFailed|SessionRetried|SessionCompactionStarted|SessionCompactionDelta|SessionCompactionEnded|SessionRevertStaged|SessionRevertCleared|SessionRevertCommitted)1 =/.test(
/export type (SessionAgentSelected|SessionModelSelected|SessionMoved|SessionRenamed|SessionForked|SessionPromptPromoted|SessionPromptAdmitted|SessionExecutionSettled|SessionInstructionsUpdated|SessionInstructionsDiscovered|SessionSynthetic|SessionSkillActivated|SessionShellStarted|SessionShellEnded|SessionStepStarted|SessionStepEnded|SessionStepFailed|SessionTextStarted|SessionTextDelta|SessionTextEnded|SessionToolInputStarted|SessionToolInputDelta|SessionToolInputEnded|SessionToolCalled|SessionToolProgress|SessionToolSuccess|SessionToolFailed|SessionRetried|SessionCompactionStarted|SessionCompactionDelta|SessionCompactionEnded|SessionRevertStaged|SessionRevertCleared|SessionRevertCommitted)1 =/.test(
generatedTypes,
)
) {