bd delete --from-file should add deleted issues to deletions manifest

When using bd delete --from-file to bulk delete issues, the deleted issue IDs are not being added to the deletions.jsonl manifest.

This causes those issues to be resurrected during bd sync when git history scanning finds them in old commits.

Expected: All deleted issues should be added to deletions.jsonl so they wont be reimported from git history.

Workaround: Manually add deletion records to deletions.jsonl.


Add --pinned and --no-pinned flags to bd list

Add filtering flags to bd list: --pinned shows only pinned issues, --no-pinned excludes pinned issues. Default behavior shows all issues with a pin indicator.

Already implemented - --pinned and --no-pinned flags exist in bd list


bd mail uses git user.name for sender instead of BEADS_AGENT_NAME

When sending mail via `bd mail send`, the sender field in the stored issue uses git config user.name instead of the BEADS_AGENT_NAME environment variable.

Reproduction:
1. Set BEADS_AGENT_NAME=gastown-alpha
2. Run: bd mail send mayor/ -s 'Test' -m 'Body'
3. Check the issue.jsonl: sender is 'Steve Yegge' (git user.name) not 'gastown-alpha'

Expected: The sender field should use BEADS_AGENT_NAME when set.

This breaks the mail system for multi-agent workflows where agents need to identify themselves by their role (polecat, refinery, etc.) rather than the human user's git identity.

Related: gt mail routing integration with Gas Town

Not applicable - filed against stale bd v0.30.6


gt polecat done should auto-stop running session

Currently 'gt polecat done' fails if session is running, requiring a separate 'gt session stop' first. This is unnecessary friction - done should just stop the session automatically since that's always what you want.

Moving to gastown - this is a gt issue not bd


GH#409: bd init uses issues.jsonl but docs say beads.jsonl

bd init creates config referencing issues.jsonl but README/docs reference beads.jsonl as canonical. Standardize naming. See GitHub issue #409.


bd ready resolves external dependencies

Extend bd ready to check external blocked_by references:

1. Parse external:<project>:<capability> from blocked_by
2. Look up project path from external_projects config
3. Check if target project has provides:<capability> label on a closed issue
4. If not satisfied, issue is blocked

Example output:
```bash
bd ready
# gt-xyz: blocked by external:beads:mol-run-assignee (not provided)
# gt-abc: ready
```

Depends on: bd-om4a (external: prefix), bd-66w1 (config)

Part of cross-project dependency system.
See: gastown/docs/cross-project-deps.md

Implemented external dep resolution in GetReadyWork - filters issues with unsatisfied external:project:capability deps


Deferred HOP schema additions (P2/P3)

Deferred from bd-7pwh after review. Add when semantics are clearer and actually needed:

- assignee_ref: Structured EntityRef alongside string assignee
- work_type: 'mutex' vs 'open_competition' (everything is mutex in v0.1)
- crystallizes: bool for work that compounds vs evaporates (can derive from issue_type)
- cross_refs: URIs to beads in other repos (needs federation first)
- skill_vector: []float32 embeddings placeholder (YAGNI)

These can be added later without breaking changes (all optional fields).


Investigate incremental blocked_issues_cache updates at scale

Current blocked_issues_cache strategy does full DELETE + INSERT on every dependency/status change.

**Problem at scale:**
- 10K issues: ~50ms rebuild (acceptable)
- 100K issues: ~500ms rebuild (noticeable)
- 1M issues: multi-second rebuilds (problematic)

**Current implementation (blocked_cache.go:104-154):**
- DELETE FROM blocked_issues_cache
- INSERT with recursive CTE

**Potential optimizations:**
1. **Incremental updates:** Only add/remove affected issue IDs instead of full rebuild
2. **Dirty tracking:** Skip rebuild if cache is already valid
3. **Async rebuild:** Rebuild in background, serve stale cache briefly
4. **Partial invalidation:** Only invalidate affected subtree

**Decision needed:** Is this premature optimization? Current target is <100K issues.

**Benchmark:** Add benchmark for cache rebuild at 100K scale to measure actual impact.


Run bd doctor at end of bd init to verify setup

Run bd doctor diagnostics at end of bd init (after line 398 in init.go). If issues found, warn user immediately: '⚠ Setup incomplete. Run bd doctor --fix to complete setup.' Catches configuration problems before user encounters them in normal workflow.

Already implemented in commits ec4117d0 and 3a36d0b9 - hooks/merge driver install by default, doctor runs at end of init


Support wisps in nodb mode for lightweight Gas Town rigs

Enable proper wisp support in --no-db mode to allow lightweight Gas Town rigs (including HQ/Mayor) to run without SQLite overhead.

## Motivation
Gas Town HQ and simple rigs could benefit from nodb mode's simplicity. Currently wisps don't work properly in nodb mode.

## Proposed Design

### Phase 1: Session-scoped wisps
- Memory storage already has Wisp field on Issue
- Wisps exist only for the session lifetime
- Acceptable for patrol cycles that complete within a session
- Depends on: bd-9avq (fix the leak)

### Phase 2: Optional wisp persistence
- Add `.beads/wisps.jsonl` for wisp storage (gitignored)
- Load wisps from this file on nodb startup
- Save wisps to this file on nodb exit
- Wisps persist across restarts but don't sync via git

### Phase 3: Verify mol commands
- Test mol squash, burn, bond work with memory storage
- These currently check for SQLite storage type
- May need interface-based approach instead of type assertions

## Files affected
- cmd/bd/nodb.go - wisp filtering and optional persistence
- internal/storage/memory/ - verify wisp field handling
- cmd/bd/mol_*.go - verify memory storage compatibility
- .beads/.gitignore - add wisps.jsonl

Simplified scope: just fix the leak (bd-9avq). Session-scoped wisps are acceptable - they're ephemeral by design. Persistence can be added later if needed.