writer-reconcilerlisted

# Writer Reconciler Runtime reconciler for the vault writer pipeline (Posture D — per-destination contract-driven hybrid; Session 4 L-41). Writers running under `posture: staged` emit content packets to `~/.claude/state/vault-staging/<writer-id>/<sha>.json` via `lib/staging-emit.sh`. This skill picks up packets on cron tick (15-min default per pillar 7 `reconciler_tick_minutes_default`) and writes the resolved content to the canonical destination via mechanical-only reconciliation. Reconciliation rules resolution follows three-tier precedence per Session 4 L-44: 1. **Folder-level `_processing-rules.json`** at the destination directory (or walked-up parent); honors `applies_to: this-folder-and-subfolders` inheritance. 2. **File-type-contracts** (`governance/file-type-contracts/<type>.md.json`) when the destination's `output_type` matches a known contract. 3. **Universal pillar 7 defaults** (`governance/vault-writers-rules.json :: processing_defaults`) as the floor — `dedup: content-hash`, `survivorship: newer-mtime-wins`, `merge: union-dedupe-by-key`. The reconciler is **mechanical-only** per Session 4 L-50 + R-34 self-healing boundary. Semantic merging (paraphrase, summarization, re-ordering by meaning) is OUT of scope. Operator edits are preserved via two-signal detection per Session 4 L-45. ## Invocation ```sh # Cron tick (every 15 min default; bootstrapped by install-cron.sh) ./process.sh # Explicit flush of a single destination (waits for packets, appli