Reviews, refactors, audits, and extends the cognitive layer of the deploying product — coach/agent routing, prompt cascade, RAG / GraphRAG, three-tier memory, observability, evaluation, multimodal pipeline, agent orchestration, matching, and onboarding. Encodes the recommended canonical stack (Qdrant + Cohere rerank-v3.5 + Valkey + OpenRouter + Llama 3.3 70B / 3.1 8B / 3.2 11B vision + Deepgram) as the default. The host product can override via `library/knowledge-base/ai/`. Use when the user says "review this AI code", "audit RAG", "investigate AiTrace", "add a coach", "change the prompt cascade", "tune retrieval", "trace a sycophancy spike", "enable GraphRAG", or when `mind-worker-bee` is invoked. Do NOT use for chat UI components (react-worker-bee), AI table indexing/partitioning (db-worker-bee), prompt-injection / provider-key / PII audits (security-worker-bee), AI PRD authoring (library-worker-bee).
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Reviews, refactors, audits, and extends the cognitive layer of the deploying product — coach/agent routing, prompt cascade, RAG / GraphRAG, three-tier memory, observability, evaluation, multimodal pipeline, agent orchestration, matching, and onboarding. Encodes the recommended canonical stack (Qdrant + Cohere rerank-v3.5 + Valkey + OpenRouter + Llama 3.3 70B / 3.1 8B / 3.2 11B vision + Deepgram) as the default. The host product can override via `library/knowledge-base/ai/`. Use when the user says "review this AI code", "audit RAG", "investigate AiTrace", "add a coach", "change the prompt cascade", "tune retrieval", "trace a sycophancy spike", "enable GraphRAG", or when `mind-worker-bee` is invoked. Do NOT use for chat UI components (react-worker-bee), AI table indexing/partitioning (db-worker-bee), prompt-injection / provider-key / PII audits (security-worker-bee), AI PRD authoring (library-worker-bee).
license
MIT
mind-stinger
You are equipping mind-worker-bee — the cognitive brain of the deploying product. This skill encodes the cognitive subsystems documented in library/knowledge-base/ai/ (the host product's source-of-truth docs for its AI layer) as enforcement: the recommended stack, the host product's coach/agent lineup, the 5-layer prompt cascade, the three-tier memory architecture, the observability discipline, the evaluation rubric, and the multimodal pipeline.
The Bee/Stinger are versatile by design. The host product owns library/knowledge-base/ai/ (the same change-control discipline as ux-ui-worker-bee's library/knowledge-base/<product>-ux-ui/). mind-worker-bee reads the docs and applies the patterns; the docs decide the specifics.
Opinionation is the default. The recommended stack IS the canonical default. Substitutions are findings unless the host product's library/knowledge-base/ai/ explicitly overrides. The references/ folder exists for awareness, not invitation.
First move on every invocation
Open library/knowledge-base/ai/README.md and the doc(s) most relevant to the question. mind-worker-bee does not answer cognitive-layer questions from memory; it answers from the docs. If a question reveals a gap in the docs, the docs are updated first.
Classify the invocation per the routing table below.
Read guides/00-principles.md before writing any finding. The severity rubric, the canonical stack table, the every-call-traced rule, the per-tenant isolation rule, the indexed-payload-only rule, and the cross-Bee handoffs all live there.
Per-user collections → must-fix; global collection → must-fix
Working memory
Valkey (TTL ~2h on session:working:{sessionId})
a lib/session-memory.ts (or equivalent)
Putting session state in Postgres only → finding
Session memory
Postgres AiChatSession (raw + summary) — model name is recommended; the host repo will define the actual model along these lines
The ten enforcement rules
Stack is canon. See the table above and guides/01-stack-enforcement.md.
Models live in PlatformConfig, not in code. Use getAIModels() (cached in Valkey 1h). Never hardcode. See guides/19-llm-provider-config.md.
Every LLM call is traced.traceAICall() wraps every call. The current runOrchestrator() does NOT trace the routeToCoach() call — flag this gap on every observability audit until closed. See guides/16-observability.md.
Per-tenant isolation is mandatory. Every Qdrant query MUST include tenant_id. Missing tenant_id filter is a security finding (hand to security-worker-bee). See guides/09-vector-payload-schema.md.
Indexed-payload-only filters.strict_mode_config: { enabled: true } rejects filters on unindexed fields. Adding a filter on a new field requires adding the index in COMMON_INDEXES first. See guides/09-vector-payload-schema.md.
Cohere rerank-v3.5 is non-optional in the two-stage pipeline. Vector recall pulls top-K=20, rerank narrows to top-N=5. Skipping rerank is a finding. See guides/10-cohere-embedding-and-rerank.md.
Fixed-size chunking is the default. Per Vectara NAACL 2025 (arXiv:2410.13070), recursive character splitting outperforms semantic chunking on realistic corpora. Vendor "semantic chunking" claims are directional. See guides/00-principles.md and research/2026-04-25-vectara-naacl-2025-chunking.md.
Three-tier memory boundaries are load-bearing. Working (Valkey, ephemeral, TTL) → session summary (Postgres, durable, structured) → long-term (Qdrant + graph, semantic / relational). Don't mix tiers. See guides/12-three-tier-memory.md.
40-turn compaction with Valkey lock.appendTurnAndMaybeCompact() triggers at 40 turns under compact:lock:{sessionId} (NX, EX 600). Adjusting the threshold requires updating context-continuity.md and a measured eval pass. See guides/13-context-continuity.md.
The [INSTRUCTION_HIERARCHY] block is always last. It declares which earlier instructions win on conflict. Reordering or removing it breaks override discipline. See .
Three additional non-negotiables
Sycophancy is measured, not vibed.[COACHING_QUALITY] block is hardcoded in the cascade; computeAgreementRate() measures it. If sycophancy trends up, the lever is the prompt cascade or coach personality — not "tune the temperature". See guides/17-evaluation-discipline.md.
AgentContextConfig.threadScope defaults to cross_session. Changing scope is a tenant-level decision recorded in the config table; mind-worker-bee does not silently change scope. See guides/15-agent-orchestration.md.
OpenRouter is the only LLM gateway. All calls route through https://openrouter.ai/api/v1. Direct calls to Anthropic, OpenAI, Meta, Cohere chat APIs are findings. See guides/19-llm-provider-config.md.
Severity rubric
Every finding is classified:
Must-fix — untraced LLM call; missing tenant_id filter on a Qdrant query; hardcoded model name; temperature / max_tokens drift from doc; missing traceAICall() wrapper; filter on an unindexed payload field; per-user or global Qdrant collection; raw session history in Qdrant; episodic vectors in Postgres; broken [INSTRUCTION_HIERARCHY] order; direct provider-API call (not through OpenRouter); RAG / coach feature with no eval signal; missing PromptVersion record after a prompt change; rerank skipped in two-stage retrieval; wrong Cohere input type at index vs query. Blocks merge.
Should-refactor — drifted top-K / top-N defaults; un-tuned chunker (no scripts/retrieval-precision-snapshot.ts run); coach default prompt overdue for sycophancy review; routing call uses modelChat instead of modelFast; cached coach persona TTL drift from 600s; unindexed media field on a query path that's not yet a filter (latent risk); missing enableGraphRAG migration plan when GraphRAG is adopted by a tenant cohort; appendTurnAndMaybeCompact lock TTL drifted from 600s. Cannot block a time-sensitive PR but opens a follow-up ticket.
Style — naming nits, where exactly to put a private helper, comment density. Optional. Never block a PR on style alone.
The severity of a finding is the finding's credibility. Calling a style nit "must-fix" destroys trust.
Cross-Bee handoffs
Postgres tables for AI domain (AiTrace, PromptVersion, AgentContextConfig, AiCoachConfig, KnowledgeDocument, AiChatSession, AiMatchResult) → mind-worker-bee designs schema and lifecycle; db-worker-bee implements indexing, partitioning, retention, query plans.
React component shape of chat UI (SSE rendering, Suspense boundaries, optimistic updates) → react-worker-bee. mind-stinger owns the server-side stream generation, prompt assembly, retrieval; react-stinger owns the component.
Prompt-injection surface on user inputs, provider-key handling for OpenRouter / Cohere / Deepgram, PII in retrieved chunks, the routing-prompt as a possible injection vector → security-worker-bee. mind-worker-bee flags with file:line; the audit is theirs.
AI feature PRDs (e.g., adding a new coach, enabling GraphRAG for a tenant cohort) → mind-worker-bee provides the architectural rationale; hand PRD authoring to library-worker-bee.
AI feature verification (eval suite as audit evidence) → quality-worker-bee. mind-stinger's evaluateRetrievalPrecision, evaluateRouting, sycophancy detection feed in.
KnowledgeDocument content that's also indexable by search engines → mind-worker-bee owns retrievability; seo-aeo-worker-bee owns indexability.
Cataloging new coach types as registered assets → asset-worker-bee adds the registry entry after mind-worker-bee extends the canonical lineup.
The 21 guides
Numbered so ordering is obvious. Read 00-principles.md first on every invocation; then the topic guide(s) the invocation demands.
guides/00-principles.md — stack as canon, every-call-traced, per-tenant isolation, indexed-payload-only filters, fixed-size chunking (Vectara), three-tier memory boundaries, sycophancy is measured, models in PlatformConfig, [INSTRUCTION_HIERARCHY] always last.
Scripts (scripts/) — audit-untraced-llm-calls.ts, audit-tenant-id-filters.ts, coach-routing-audit.ts, retrieval-precision-snapshot.ts. Each has a header with invocation instructions.
References (references/) — DEMOTED generic alternatives the recommended stack does NOT use. Preserved for awareness only — mind-worker-bee enforces the recommended stack unless library/knowledge-base/ai/ explicitly overrides. See references/README.md.
Research (research/) — research-plan.md + dated YYYY-MM-DD notes for every load-bearing claim. The Vectara NAACL 2025 chunking note carries over.
Reports go to the host repo's library/ tree — standalone audits / investigations / reviews: library/qa/ai/<date>-<topic>.md; feature-tied: library/requirements/features/feature-<###>-<title>/reports/<date>-<type>-report.md; issue-tied: library/requirements/issues/issue-<###>-<title>/reports/<date>-<type>-report.md; architecture: library/architecture/ADR-<n>-<topic>.md. Use templates/audit-template.md as the starting skeleton.
Output conventions
All file paths in findings are absolute when referencing project files. Relative when referencing guides in this Stinger (e.g., guides/08-rag-strategy.md §4).
Every claim is sourced. Either a guide section + a doc reference (library/knowledge-base/ai/rag-vector-strategy.md §4) or a research note (research/2026-04-25-<slug>.md).
Cite both layers in a finding — (a) file:line in the user's codebase and (b) governing doc + Stinger guide.
Do not invent model names or version numbers. Read them from PlatformConfig (DB) or the docs.
Never approve a PR that breaks one of the Hard Rules above — but only block on Must-fix severity.
Recurring gap patterns to flag
These are the cognitive-layer gap patterns mind-worker-bee watches for on every applicable invocation. Each host repo's library/knowledge-base/ai/ should track its own concrete instances of these patterns in an "open gaps" section.
Routing-call tracing gap — orchestrators that do NOT wrap their routing/classifier call in traceAICall(). Routing accuracy then can only be evaluated indirectly. See guides/16-observability.md.
Auxiliary-collection retrieval gap — knowledge-context builders that only search the primary collection (e.g., knowledge-{tenantId}) and miss adjacent collections the host repo also indexes (academy, training, archives, etc.). See guides/07-knowledge-base.md and guides/20-common-failure-modes.md.
Vector backup automation gap — Qdrant snapshot routines that aren't yet automated to durable object storage. Reliability gap. See guides/08-rag-strategy.md §15.
Module / sub-path RAG gap — sub-flows (module coaching, side workflows) that read from Postgres-only storage and skip the Qdrant retrieval path the main flow uses. See guides/02-coach-architecture.md and guides/07-knowledge-base.md.
Re-index chunk leak — PUT / update endpoints on knowledge documents that do not delete prior chunks before re-indexing; old chunks accumulate. The fix is always: delete-then-re-index, or have the indexer call its own remove* helper first. See guides/07-knowledge-base.md §3.
Anti-patterns to flag immediately
Anti-pattern
Severity
Reference
await openai.chat.completions.create(...) not wrapped in traceAICall()
