Adds the third AI detective in the Investigation Bureau runtime: C. Auguste
Dupin, who scans a corpus shortlist for pairs (or small groups) of chunks
that cannot both be true under any ordinary reading.
Runtime:
- prompts/dupin.md — discipline (no contradiction without ≥2 distinct
chunk_ids; reject same-vocabulary near-misses; FEW high-confidence
over MANY weak ones; emit `NO_CONTRADICTIONS` when corpus is silent)
- src/detectives/dupin.ts — hybridSearch with k=18 (more chunks than
Holmes because contradictions emerge from comparing dispersed
claims), strict JSON-array parsing, AT MOST 3 contradictions per call
- src/tools/write_contradiction.ts — validates topic + ≥2 positions
drawn from ≥2 distinct chunks, resolves chunk_pk via DB lookup
(rejects positions citing unknown chunks), INSERTs into
public.contradictions + writes case/contradictions/R-NNNN.md
- orchestrator: new `contradiction_scan` kind dispatching to runDupin;
payload { topic, doc_id?, lang?, context_chunks? }
Chat + UI:
- request_investigation gains kind=contradiction_scan + topic arg;
triggered detective auto-resolves to dupin
- chat-bubble inline card renders dupin in orange (#ff8a4d) to
distinguish from holmes (cyan) and locard (green)
- /jobs/[id] page swaps title + subtitle + tone per detective;
"Question" label becomes "Topic" for contradiction_scan
- /api/jobs/[id] hydrates public.contradictions when outputs[] surfaces
contradiction_ids
- job-status-poller renders ContradictionCard: topic + N positions
(verbatim statements quoted, stance label optional, link to source
chunk) + optional notes panel, with resolution_status badge
(open/resolved/irreconcilable)
R-NNNN shares the contradiction_id_seq slot with relation per
CLAUDE.md naming — same conceptual class (a connection between two
pieces of evidence in tension).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Closes the loop between the chat UI and the Investigation Bureau runtime.
Chat tool (web/lib/chat/tools.ts):
- request_investigation { kind, question, doc_id?, chunks?, claim? }
INSERTs a row in public.investigation_jobs and returns
{ job_id, kind, status, eta_seconds, status_url, detective }.
- kind=hypothesis_tournament → Holmes (1 question → 2-3 rival hypotheses)
- kind=evidence_chain → Locard (1 doc → grade-A/B/C evidence with chain
of custody, default top-5 anomaly chunks)
- Plumbed user.email through ToolHandlerContext so triggered_by audits
the requesting user.
Public job viewer:
- GET /api/jobs/[id] joins investigation_jobs → public.evidence +
public.hypotheses for the IDs surfaced in outputs[]. Returns one
payload the page can render without n+1 round-trips. Strips
triggered_by from the response (it carries the user's email).
- app/jobs/[id]/page.tsx server-renders the case-file shell:
detective lore header (Holmes blue or Locard green), question chip,
scope chip with link back to the document.
- components/job-status-poller.tsx client island that polls every 3 s
while non-terminal, then once on terminal to hydrate evidence +
hypotheses. Renders:
· Phase tracker (queued → running → complete | failed)
· Hypothesis cards w/ prior + posterior bars + Δ delta indicator
+ Tetlock band badge (high/medium/low/speculation)
· Argument-for / argument-against with [[wiki-link]] auto-linking
to /d/<doc>/p<NNN>#<cNNNN>
· Evidence cards w/ Grade A/B/C badge + verbatim blockquote +
bbox crop preview via /api/crop + custody-steps disclosure
· Empty/in-flight panel ("os detetives estão lendo o corpus")
· Failure panel surfacing error + partial outputs
Inline chat-bubble card (components/chat-bubble.tsx):
- ToolTrace.richRender recognises request_investigation results and
renders a detective banner with status + ETA + link to /jobs/[id]
(target=_blank). Error case renders a red strip with the message.
UX flow now: user asks Sherlock a question → request_investigation
queues the job → chat card shows "🔎 Holmes · hypothesis_tournament ·
ETA ~60s" → user clicks → /jobs/<id> live-updates → 60 s later, 2-3
rival hypotheses + their arguments + chunk citations are rendered with
Bayesian update visible.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Luiz Gustavo