insforge-debug

What this skill does

# InsForge Debug

Diagnose problems in InsForge projects by combining the backend's observability primitives — logs, metrics, db-health, advisor, policies, metadata, error objects, deploy state, and AI assist. This skill provides:

1. A reference per **debug primitive** (one observability surface each — under `references/`)
2. **Symptom Recipes** (below) that name the primitive sequence for known reactive symptoms and proactive audits

**Always use `npx @insforge/cli`** — never install the CLI globally.

## Fastest Path: AI-Assisted Triage

When the user gives a concrete description (error message, failing URL, HTTP status), hand it to the InsForge debug agent. Unlike the other primitives, this one returns suggestions, not just observations — verify the diagnosis against the primitives it cites before acting on it.

```bash
npx @insforge/cli diagnose --ai "<issue description>"
```

See [references/ai-assisted.md](references/ai-assisted.md) for when to use this first vs when to skip, and how to verify the output.

## Debug Primitives

Each primitive is one independently-queryable observability surface backed by a distinct underlying data source. Real diagnoses are compositions of primitives.

All commands run via `npx @insforge/cli ...`. The `(command)` shown next to each primitive is the actual CLI command — primitive names are concept labels, **not** CLI subcommand names (e.g., "DB health" is `diagnose db`, not `diagnose db-health`; "Policies" is `db policies`, not `diagnose policies`).

| Primitive (command) | What you see | Reference |
|---------------------|-------------|-----------|
| **Logs** (`logs <source>`; `diagnose logs` for cross-source aggregate) | Time-stream of events from 5 backend sources (`insforge.logs` / `postgREST.logs` / `postgres.logs` / `function.logs` / `function-deploy.logs`) | [references/logs.md](references/logs.md) |
| **Metrics** (`diagnose metrics`) | EC2 instance time-series (CPU / memory / disk / network) over `1h` / `6h` / `24h` / `7d` | [references/metrics.md](references/metrics.md) |
| **DB health** (`diagnose db`) | Current Postgres state via 7 named checks (`connections` / `slow-queries` / `bloat` / `size` / `index-usage` / `locks` / `cache-hit`) | [references/db-health.md](references/db-health.md) |
| **Advisor** (`diagnose advisor --json`) | Static-scan issues across 3 categories (`security` / `performance` / `health`) with `ruleId` / `affectedObject` / `recommendation` | [references/advisor.md](references/advisor.md) |
| **Policies** (`db policies`) | Active RLS rules from `pg_policies` (USING / WITH CHECK per cmd per role) — returns all policies as a dump | [references/policies.md](references/policies.md) |
| **Metadata** (`metadata --json`) | Declarative backend state dump (auth config / tables / buckets / functions / AI models / realtime channels) | [references/metadata.md](references/metadata.md) |
| **Error objects** (no command — read SDK / HTTP response) | SDK error envelope + HTTP status — the routing table from a client-visible error to the right log source | [references/error-objects.md](references/error-objects.md) |
| **Deploy state** (`deployments list` + `deployments status <id> --json` + `logs function-deploy.logs`) | Frontend (Vercel) deployment history + per-deploy metadata, plus edge function deploy logs | [references/deploy-state.md](references/deploy-state.md) |
| **AI assist** (`diagnose --ai "<description>"`) | LLM agent that combines the other primitives — returns a diagnosis with suggestions | [references/ai-assisted.md](references/ai-assisted.md) |

## Symptom Recipes

Each recipe is a primitive call sequence with one-line "look for X" at each step. Command syntax, flags, and deep interpretation are in the per-primitive references above.

### Recipe: SDK returned `{ data: null, error: { code, message } }`

1. **error-objects** — read code/message/details. If code starts with `PGRST*`, route by prefix using the table in the reference.
2. **logs** (matching source per error-objects routing) — find the error timestamp, get the full backend-side context.
3. **db-health** (`connections`, `locks`, `slow-queries`) — only if the error suggests DB issue (PostgREST timeout, lock conflict).

### Recipe: HTTP 4xx/5xx response on a specific request

1. **error-objects** — use the HTTP status routing table to pick the log source (each status has a distinct path; 429 is special).
2. **logs** (right source for that status) — find the failing request line and error.
3. **metrics** — only for 5xx patterns spanning multiple endpoints, to confirm system-wide load issue.

### Recipe: RLS access issue (403 on write, or empty result on read)

> Same bug, two surfacings. Writes (INSERT / UPDATE / DELETE) fail loudly with **403**. Reads (SELECT) fail silently with an **empty array** — PostgREST filters denied rows out instead of returning 403, so the request looks successful with zero rows. Diagnosis path is the same except step 1 only applies to the 403 variant.

1. **logs** (`postgREST.logs`) — *403 variant only*: find the policy violation event with table and role context. *Empty-result variant*: skip — no error is logged for silently-filtered rows.
2. **policies** — list policies for that table; walk USING / WITH CHECK against the actual request and the JWT claim used.
3. **metadata** — verify auth config (which claim feeds `auth.uid()` / `requesting_user_id()`; for third-party auth like Clerk/Auth0, is the provider registered as a JWT issuer?).
4. **db query** (`db query "<sql>"`) — *empty-result variant only*: confirm rows that *should* be visible actually exist by querying as service role (not as the user): `npx @insforge/cli db query "SELECT id, user_id FROM <table>"`. Distinguishes "RLS filtered everything" from "no matching data exists".

### Recipe: Login fails / OAuth callback errors / token expired

1. **logs** (`insforge.logs`) — find auth errors with timestamp and provider context.
2. **metadata** — verify the provider is enabled, redirect URLs match the callback URL exactly (protocol + host + path).

### Recipe: Edge function runtime error / timeout

1. **logs** (`function.logs`) — get the error stack and execution context.
2. **metadata** — confirm the function exists and `status: "active"`.
3. (If needed) `npx @insforge/cli functions code <slug>` — inspect the source for obvious issues.

### Recipe: `functions deploy` failed

1. **deploy-state** (`function-deploy.logs`) — find the build/push error.
2. **metadata** — confirm whether the function ended up in the active list (partial-deploy detection).

### Recipe: `deployments deploy` failed (Vercel)

1. **deploy-state** (`deployments list` + `status <id> --json`) — read `status`, `metadata.webhookEventType`, and `envVarKeys`.
2. **Local** `npm run build` — reproduce the same error locally for faster iteration.

### Recipe: Single slow query / one endpoint slow

1. **logs** (`postgres.logs`) — find the query text and timestamp.
2. **db-health** (`slow-queries`, `index-usage`) — confirm it's in `pg_stat_statements`; check for missing index.
3. **policies** — if it's an RLS-gated table, verify the policy isn't adding hidden joins.

### Recipe: All responses slow / high CPU/memory (active incident)

1. **metrics** (`--range 1h`) — confirm system-wide pressure (CPU / memory / disk).
2. **db-health** — DB is the most common bottleneck; check `connections`, `locks`, `slow-queries`.
3. **logs** (`diagnose logs` aggregate) — error patterns across sources at the spike timestamp.
4. **advisor** (`--severity critical`) — pre-existing known issues that may explain the degradation.

### Recipe: Realtime channel won't connect / messages missing

1. **logs** (`insforge.logs`) — WebSocket errors and subscription failures.
2. **metadata** — verify the channel pattern matches what the client subscribes to, `enabled: true`.
3. **policies** — RLS on the underlying table (realtime delivers row changes; RLS gates which rows the subscriber sees).

### Recipe: 429