docs: confirm Codex SessionStart dogfood

README.md

@@ -155,7 +155,7 @@ agentcairn works at two levels. **Plugin hosts** (Claude Code, Codex, and Antigr
 | Host | Support | Set up with | Ambient capture |
 |---|---|---|---|
 | **Claude Code** | 🟢 Plugin | `cairn install claude-code` | ✅ recall-at-start + capture-at-end |
-| **Codex** | 🟢 Plugin | `cairn install codex` | ◐ recall/`remember` live; ambient hooks bundled (verifying) [^codex-hooks] |
+| **Codex** | 🟢 Plugin | `cairn install codex` | ◐ recall-at-start verified; capture-at-end bundled [^codex-hooks] |
 | Cursor | 🔌 MCP server + skill + ingest | `cairn install cursor` | ◐ `cairn sweep` auto-detects transcripts [^cursor-sweep] |
 | **OpenCode** | 🟢 Plugin + MCP + ingest | `cairn install opencode` | ✅ recall-every-turn + capture [^opencode-plugin] |
 | **Hermes Agent** | 🟢 MemoryProvider plugin | see [`integrations/hermes/`](integrations/hermes/) | ✅ recall-every-turn + capture-at-session-end |
@@ -164,7 +164,7 @@ agentcairn works at two levels. **Plugin hosts** (Claude Code, Codex, and Antigr
 | Claude Desktop | 🔌 MCP server | `cairn install claude-desktop` | — |
 | Any other MCP host | 🔌 MCP server | `uvx agentcairn` (paste the `cairn install … --print` snippet) | — |
 
-[^codex-hooks]: The Codex plugin installs and its bundled MCP server (recall/search/`remember`) is verified live in Codex. The ambient session hooks (recall-at-start, capture-at-end) ship in the plugin and use Codex's documented hooks schema, but their on-Codex behaviour isn't yet confirmed end-to-end; capture also happens out-of-band via `cairn sweep` regardless.
+[^codex-hooks]: The Codex plugin, bundled MCP server, and SessionStart recall hook are verified live end-to-end with agentcairn 0.24.2 / plugin 0.1.2. The installed SessionEnd handler uses the same corrected command-string dispatch and passes its handler probe; capture also happens out-of-band via `cairn sweep` regardless.
 [^antigravity-sweep]: The Antigravity plugin bundles the MCP server + memory skill; `cairn install antigravity --source <dir>` installs it via `agy plugin install` and removes any stale `mcpServers.agentcairn` entry from `~/.gemini/config/mcp_config.json`. Note: `agy plugin install` takes a **local directory** or a registered marketplace (not a git repo), so point `--source` at a cloned checkout's `plugin/` dir for now. Antigravity has no recognized plugin hooks, so ambient capture is out-of-band via `cairn sweep` (path: `~/.gemini/antigravity-cli/brain/<uuid>/.system_generated/logs/transcript.jsonl`).
 [^cursor-sweep]: Cursor has no plugin hooks, so ambient capture is out-of-band via `cairn sweep` (source: Cursor's global `globalStorage/state.vscdb` SQLite database, `cursorDiskKV` table, user "bubbles"). Cursor remains an MCP host for output (`cairn install cursor` → `~/.cursor/mcp.json`); there is no Cursor plugin. `cairn install cursor` also installs the `using-agentcairn-memory` skill (recall/remember guidance) to `~/.cursor/skills/using-agentcairn-memory/SKILL.md`.
 [^opencode-plugin]: `cairn install opencode` writes the MCP server entry into `~/.config/opencode/opencode.json` (under the `mcp` key), copies the ambient plugin (`agentcairn.ts` → `~/.config/opencode/plugin/`) that injects recall into every system prompt via `experimental.chat.system.transform` and captures on `session.idle`/`session.compacted` events, and installs `/recall` + `/remember` slash commands to `~/.config/opencode/commands/`. Ingest is via `cairn sweep` (OpenCode session transcripts).