# Agent Contract — TimeSafari Logging (Unified, MANDATORY)

**Scope:** Applies to all diffs and generated code in this workspace unless explicitly exempted below.  
**Goal:** One consistent, rest-parameter logging style using the project logger; no `console.*` in production code.

## Non‑Negotiables (DO THIS)
- You **MUST** use the project logger; **DO NOT** use any `console.*` methods.
- Import exactly as:
  - `import {{ logger }} from '@/utils/logger'`
  - If `@` alias is unavailable, compute the correct relative path (do not fail).
- Call signatures use **rest parameters**: `logger.info(message, ...args)`
- Prefer primitives/IDs and small objects in `...args`; **never build a throwaway object** just to “wrap context”.
- Production defaults: Web = `warn+`, Electron = `error`, Dev/Capacitor = `info+` (override via `VITE_LOG_LEVEL`).
- **Database persistence:** `info|warn|error` are persisted; `debug` is not. Use `logger.toDb(msg, level?)` for DB-only.

## Available Logger API (Authoritative)
- `logger.debug(message, ...args)` — verbose internals, timings, input/output shapes
- `logger.log(message, ...args)`  — synonym of `info` for general info
- `logger.info(message, ...args)` — lifecycle, state changes, success paths
- `logger.warn(message, ...args)` — recoverable issues, retries, degraded mode
- `logger.error(message, ...args)` — failures, thrown exceptions, aborts
- `logger.toDb(message, level?)` — DB-only entry (default level = `info`)
- `logger.toConsoleAndDb(message, isError)` — console + DB (use sparingly)
- `logger.withContext(componentName)` — returns a scoped logger

## Level Guidelines (Use These Heuristics)
### DEBUG
Use for method entry/exit, computed values, filters, loops, retries, and external call payload sizes.
```ts
logger.debug('[HomeView] reloadFeedOnChange() called');
logger.debug('[HomeView] Current filter settings', settings.filterFeedByVisible, settings.filterFeedByNearby, settings.searchBoxes?.length ?? 0);
logger.debug('[FeedFilters] Toggling nearby filter', this.isNearby, this.settingChanged, this.activeDid);
```
**Avoid:** Vague messages (`'Processing data'`).

### INFO
Use for user-visible lifecycle and completed operations.
```ts
logger.info('[StartView] Component mounted', process.env.VITE_PLATFORM);
logger.info('[StartView] User selected new seed generation');
logger.info('[SearchAreaView] Search box stored', searchBox.name, searchBox.bbox);
logger.info('[ContactQRScanShowView] Contact registration OK', contact.did);
```
**Avoid:** Diagnostic details that belong in `debug`.

### WARN
Use for recoverable issues, fallbacks, unexpected-but-handled conditions.
```ts
logger.warn('[ContactQRScanShowView] Invalid scan result – no value', resultType);
logger.warn('[ContactQRScanShowView] Invalid QR format – no JWT in URL');
logger.warn('[ContactQRScanShowView] JWT missing "own" field');
```
**Avoid:** Hard failures (those are `error`).

### ERROR
Use for unrecoverable failures, data integrity issues, and thrown exceptions.
```ts
logger.error('[HomeView Settings] initializeIdentity() failed', err);
logger.error('[StartView] Failed to load initialization data', error);
logger.error('[ContactQRScanShowView] Error processing contact QR', error, rawValue);
```
**Avoid:** Expected user cancels (use `info`/`debug`).

## Context Hygiene (Consistent, Minimal, Helpful)
- **Component context:** Prefer scoped logger.
  ```ts
  const log = logger.withContext('UserService');
  log.info('User created', userId);
  log.error('Failed to create user', error);
  ```
  If not using `withContext`, prefix message with `[ComponentName]`.
- **Emojis:** Optional and minimal for visual scanning. Recommended set:
  - Start/finish: 🚀 / ✅  •  Retry/loop: 🔄  •  External call: 📡  •  Data/metrics: 📊  •  Inspection: 🔍
- **Sensitive data:** Never log secrets (tokens, keys, passwords) or payloads >10KB. Prefer IDs over objects; redact/hash when needed.

## Migration — Auto‑Rewrites (Apply Every Time)
- Exact transforms:
  - `console.debug(...)` → `logger.debug(...)`
  - `console.log(...)`   → `logger.log(...)` (or `logger.info(...)` when clearly stateful)
  - `console.info(...)`  → `logger.info(...)`
  - `console.warn(...)`  → `logger.warn(...)`
  - `console.error(...)` → `logger.error(...)`
- Multi-arg handling:
  - First arg becomes `message` (stringify safely if non-string).
  - Remaining args map 1:1 to `...args`:  
    `console.info(msg, a, b)` → `logger.info(String(msg), a, b)`
- Sole `Error`:
  - `console.error(err)` → `logger.error(err.message, err)`
- **Object-wrapping cleanup:** Replace `{{ userId, meta }}` wrappers with separate args:  
  `logger.info('User signed in', userId, meta)`

## DB Logging Rules
- `debug` **never** persists automatically.
- `info|warn|error` persist automatically.
- For DB-only events (no console), call `logger.toDb('Message', 'info'|'warn'|'error')`.

## Exceptions (Tightly Scoped)
Allowed paths (still prefer logger):
- `**/*.test.*`, `**/*.spec.*`
- `scripts/dev/**`, `scripts/migrate/**`
To intentionally keep `console.*`, add a pragma on the previous line:
```ts
// cursor:allow-console reason="short justification"
console.log('temporary output');
```
Without the pragma, rewrite to `logger.*`.

## CI & Diff Enforcement
- Do not introduce `console.*` anywhere outside allowed, pragma’d spots.
- If an import is missing, insert it and resolve alias/relative path correctly.
- Enforce rest-parameter call shape in reviews; replace object-wrapped context.
- Ensure environment log level rules remain intact (`VITE_LOG_LEVEL` respected).

## Quick Before/After
**Before**
```ts
console.log('User signed in', user.id, meta);
console.error('Failed to update profile', err);
console.info('Filter toggled', this.hasVisibleDid);
```
**After**
```ts
import {{ logger }} from '@/utils/logger';

logger.info('User signed in', user.id, meta);
logger.error('Failed to update profile', err);
logger.debug('[FeedFilters] Filter toggled', this.hasVisibleDid);
```

## Checklist (for every PR)
- [ ] No `console.*` (or properly pragma’d in the allowed locations)
- [ ] Correct import path for `logger`
- [ ] Rest-parameter call shape (`message, ...args`)
- [ ] Right level chosen (debug/info/warn/error)
- [ ] No secrets / oversized payloads / throwaway context objects
- [ ] Component context provided (scoped logger or `[Component]` prefix)

_Unified on: 2025-08-15 08:11:46Z_