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extraction: the spine stage — cross-stretch assembly between extract and audit

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Per-batch pipeline is now extract → spine → audit → merge (owner order,
2026-09-30), the spine inside the serialized audit section so it reads
the graph exactly as the following audit will. Measured motive: 0 of 133
chains in the live corpus crossed a stretch boundary — no stage minted
cross-stretch chains.

- src/agent/subagents/spine.ts: SESSION/NOTES spine preambles + shared
  SPINE_CORE (span doctrine; extraction doctrines carried over), the
  submit_spine TypeBox schema, validateSpine (mechanical span law: every
  chain touches >=1 fresh endpoint AND >=1 existing digest endpoint;
  unknown ids, self-reference, and id collisions are loud), the digest
  prompt builder, and the runner (strong tier, retry-only).
- extraction.ts: 'assembling' phase, spine stage in the per-need gate,
  usage/billing stage, assemble() inside withAuditLock for both front
  doors; first stretch of a source skips the call (empty digest, no
  spend); the audit sees COMBINED propositions (chunk + connectives),
  never chains; merger receives the combined findings.
- core/graph.ts mergeFindings: chain endpoints resolve through the
  job-local map OR pass through verbatim as existing n_ ids (the spine's
  mixed namespace).
- EXTRACTION_CORE: steps-of-reasoning selection bar (examples, notation
  glosses, and restatements that no argument needs are not steps).
- Factory chunk budget 4096 -> 8192 (fewer seams, more local context).
- healStringifiedArrays moved to the shared submit seam (submit-agent.ts).
- Cost panel: Assembly row; usage records carry a spine stage (optional
  on legacy records).
- Tests +5: prompt pins, span-law matrix, digest rendering, seeded
  end-to-end flow (spanning chain + connective, verbatim n_ endpoint,
  spine billed as its own stage), non-spanning refused + retried.
This commit is contained in:
amosblomqvist
2026-09-30 16:38:45 +03:00
parent 5ed724c224
commit 52c02533d1
18 changed files with 787 additions and 87 deletions
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tests/settings-body.test.ts
+1 -1
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@@ -49,7 +49,7 @@ describe("parseAgentSettingsBody", () => {
});
const bad = parseAgentSettingsBody({ models: { teacher: {} } });
assert.equal(bad.ok, false);
if (!bad.ok) assert.match(bad.error, /unknown role "teacher" \(supported: researcher, demoBuilder, visualMaker, extractor, auditor, partitioner, problemGenerator, grader\)/);
if (!bad.ok) assert.match(bad.error, /unknown role "teacher" \(supported: researcher, demoBuilder, visualMaker, extractor, spine, auditor, partitioner, problemGenerator, grader\)/);
const malformed = parseAgentSettingsBody({ models: { researcher: { model: { provider: 1, id: "x" } } } });
assert.equal(malformed.ok, false);
});