chore: release 0.12.0 (#38)

## Summary

Bumps version to 0.12.0 and adds proper release notes for everything
since 0.9.1.

### 0.12.0 highlights
- **`crab pf serve`** — Slack-powered promptfoo agent. Non-technical
team members DM the Crab bot with `pf:` prefix, agent runs locally on
their machine, results posted back to Slack thread
- **`crab draw`** — Excalidraw collaborative whiteboarding plugin with
real-time collab
- **GPT-5 reasoning support** — `--reasoning` flag for `crab pf`,
defaults to `openai:gpt-5` with `reasoning: low`
- Bug fixes for `crab pf` test prompts and session handling

### 0.10.0 (previously unreleased)
- WIP session persistence across save/restore
- Court review prompt improvements
- Self-update and messaging fixes

## Test plan
- [ ] Verify `crab --version` shows `0.12.0`
- [ ] Verify CHANGELOG.md entries are accurate

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: MrFlounder

.release-please-manifest.json

@@ -1,3 +1,3 @@
 {
-  ".": "0.11.0"
+  ".": "0.12.0"
 }

CHANGELOG.md

@@ -2,6 +2,42 @@
 
 ## Unreleased
 
+## [0.12.0] - 2026-02-20
+
+### Added
+
+- **Slack-powered promptfoo agent** (`crab pf serve`): non-technical team members can DM the Crab bot in Slack to run the target discovery agent
+  - `crab pf serve --setup` — one-time config (Slack username, LLM provider)
+  - `crab pf serve` — starts local polling daemon
+  - Messages prefixed with `pf:` trigger the agent; file attachments supported
+  - Results (`promptfooconfig.yaml`) posted back to the Slack thread
+  - Each user runs their own daemon with their own API keys — no central server
+- **Excalidraw plugin** (`crab draw`): collaborative whiteboarding with real-time collab
+  - `crab draw new "name"` — create a new Excalidraw session
+  - `crab draw open "name"` — open an existing session
+  - `crab draw ls` — list active sessions
+  - `crab draw delete "name"` — delete a session (with interactive disambiguation)
+  - Real-time collaboration via Excalidraw's collab protocol
+- **GPT-5 reasoning support** for `crab pf`: `--reasoning` flag with `low`/`medium`/`high` effort levels for GPT-5 and o-series models
+- **Court/Review**: allow starting fresh when a review session already exists
+
+### Changed
+
+- **crab pf** defaults to `openai:gpt-5` with `reasoning: low` (was `openai:gpt-4o`)
+
+### Fixed
+
+- **crab pf**: test prompts now match provider input format
+- **crab pf**: replaced broken verify step with smoke + session test, improved session handling
+
+## [0.10.0] - 2026-02-15
+
+### Added
+
+- **WIP session persistence**: `crab wip save` and `crab wip restore` now save and restore Claude sessions across workspace boundaries
+- **Court review improvements**: enhanced reviewer and judge prompts to catch silent data corruption
+- **Release automation**: set up release-please for automated releases
+
 ### Fixed
 
 - **Self-update**: bypass GitHub raw CDN cache so `crab update` always fetches the latest version

src/crabcode

@@ -27,7 +27,7 @@
 
 set -e
 
-VERSION="0.11.0" # x-release-please-version
+VERSION="0.12.0" # x-release-please-version
 CONFIG_DIR="$HOME/.crabcode"
 CONFIG_FILE="$CONFIG_DIR/config.yaml"
 WIP_BASE="$CONFIG_DIR/wip"