Release v0.5.0 (#221)

## Summary

Bump version to 0.5.0 and update CHANGELOG.md for the new release.

## Scope

- Goals: Prepare v0.5.0 release
- Non-goals: No functional code changes

## Invariants (Must Not Regress)

- [ ] Version string is valid semver
- [ ] CHANGELOG follows Keep a Changelog format
- [ ] All tests pass
- [ ] Import architecture is intact

## Acceptance Criteria

- [ ] `pyproject.toml` version is `0.5.0`
- [ ] `CHANGELOG.md` has `[0.5.0]` section with release date
- [ ] `./scripts/dev.sh check` passes

## Test Plan

- [ ] Targeted tests: N/A (no code changes)
- [ ] `./scripts/dev.sh test -q` ✅ 736 passed
- [ ] `TYPECHECK_STRICT=1 ./scripts/dev.sh typecheck` ✅ passed

## Smoke Run (Real CLI)

- [ ] N/A — release bump only

## Adversarial Review (Answer Briefly)

- What existing behavior could this break? None — only version +
changelog.
- Worst-case input/output size? N/A.
- Any secrets/logging risks? No.
- Any async/blocking I/O added on hot paths? No.
- What error message does the user see on failure? N/A.

## Docs / Compatibility

- [ ] CHANGELOG.md updated
- [ ] No secrets committed

🤖 Generated with ouro (https://github.com/ouro-ai-labs/ouro)

Co-authored-by: ouro <197364660+ouro-ai-lab@users.noreply.github.com>

Author: luohaha

CHANGELOG.md

@@ -7,6 +7,29 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [0.5.0] - 2026-05-31
+
+### Added
+
+- **Task V2**: persistent task store with dependency graphs (`task_create`, `task_list`, `task_update`, `task_delete`, `task_link`, `task_unlink`, `task_show`) backed by SQLite. Supports `status`, `priority`, `tags`, `due_date`, and topological ordering via `task_list --order topo` (#214).
+- **Agent Swarm**: multi-agent coordination with automatic task decomposition. The orchestrator breaks down complex tasks into subtasks, spawns specialized workers, and aggregates results. Includes `task_claim` tool for workers to pick up tasks (#216, #219).
+- **Auto-swarm mode**: `--mode auto-swarm` enables fully automatic task decomposition and multi-agent execution without manual orchestration (#219).
+- **Task V2 documentation**: new `docs/tasks.md` covering task lifecycle, dependency graphs, and swarm usage (#215).
+
+### Changed
+
+- **Memory compression threshold**: increased default from 60K to 256K tokens to reduce compaction frequency (#212).
+- **Status bar improvements**: replaced Mode indicator with ↑↓ arrows for KV cache read/write, cleaner layout (#206, #207).
+- **Session resumption**: restored status bar state and added session prefix on resume (#213).
+- **Token usage persistence**: token usage stats are now persisted and restored on session resume (#217).
+
+### Fixed
+
+- **`grep_content` token waste**: output is now grouped by file with `head_limit`/`offset` pagination, `type` filter, and anti-repetition hints to reduce `RepeatedToolCallRule` triggers (#218, #220).
+- **`smart_edit` stale detection**: added mtime + content hash checks to warn when a file changed between read and edit (#210).
+- **`ReadBeforeWriteRule` partial-read guard**: prevents overwrites when only a portion of a file was read (#208).
+- **Shell exit-code interpretation**: semantic interpretation of exit codes in shell tool results (#209).
+
 ## [0.4.4] - 2026-05-24
 
 ### Added

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "ouro-ai"
-version = "0.4.4"
+version = "0.5.0"
 description = "General AI Agent System"
 readme = "README.md"
 requires-python = ">=3.12"