Release v0.18.0

[emal-avala]

Version bump 0.17.0 → 0.18.0 with CHANGELOG stamp. 46 commits since v0.17.0 — features only, no breaking changes.

Highlights

Session navigation

`/history`, `/redo`, `/rewind N`, `/info`, `/search`, `/files`, `/session`, `/open`, `/debug-tool-call`, `/transcript`.

REPL productivity

`/fast`, `/sandbox`, `/brief`, `/output-style`, `/copy`, `/editor`, `/reload`, `/tag`, `/keybindings`, `/ctxviz`, `/tokens`, `/install-github-app`, `/thinkback-play`, `/skill validate`, fuzzy completer, `@path` completion, richer `?` help, startup warning banner.

Hooks

`pre_compact` (#206), `post_compact` (#218), `pre_turn` / `post_turn` (#185), and critically — `session_start` / `session_stop` / `user_prompt_submit` are now actually wired and fire (#214); they were declared + listed but silently never ran before. `/hooks preview ` (#216) catches misspelled event names in `settings.toml`.

JSONL output

New `turn_start`, `warning`, `compact`, `permission_denied` events so automation consumers don't have to re-parse stderr or string-sniff `tool_result.output`.

Tools / rules / skills

Monitor tool (#184), project rules from `.agent/rules/*.md` (#186), per-subagent permission overlays (#187), and 5 new bundled skills.

Files bumped

File	From	To
`crates/lib/Cargo.toml`	0.17.0	0.18.0
`crates/cli/Cargo.toml` (package + dep)	0.17.0	0.18.0
`crates/eval/Cargo.toml` (dep)	0.17.0	0.18.0
`npm/package.json`	0.17.0	0.18.0
`Cargo.lock`	auto	auto

`crates/eval/Cargo.toml` is not mentioned in RELEASING.md — needed a bump too, or `cargo check` fails with "failed to select a version for agent-code-lib". Worth updating the playbook after this ships.

Verification

• `cargo check --all-targets` — clean
• `cargo clippy --all-targets -- -D warnings` — clean
• `cargo fmt --all -- --check` — clean
• `cargo test --workspace --lib` — 668 pass; 1 pre-existing failure (`sandbox::auto_detect_off_macos_is_noop`, macOS-specific test that fails on Linux — confirmed same behavior on main)
• `cargo test --all-targets` — integration test `output_format_json_no_api_key_emits_session_events` is environment-sensitive: passes in CI (no API keys in runner env) but fails locally when an API key IS set (binary then gets past the key check, LLM call fails, retries write tracing WARN to stdout → breaks JSONL parse). Confirmed same failure on clean `main` — not a regression

Changelog footer cleanup

Fixed the stale comparison-link footer: the existing `[Unreleased]` link was pointing at `v0.16.1` instead of the latest release. Added `[0.18.0]` and the missing `[0.17.0]` entries. Older gaps (0.14.0, 0.15.0) left alone.

After this merges

Per RELEASING.md §7, tag `v0.18.0` and push to trigger the release workflow (GitHub Release + binaries + crates.io + Homebrew tap + npm + Docker image).

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