v0.4.0

Added

• agyswap ctx subsystem: AST-based Repo Map (ctx map), lightweight working-state snapshots (ctx state), and real-time compression benchmarking (ctx bench [--json|-md])
• agyswap ctx bench --golden: multi-language oracle regression suite (Python, TypeScript/TSX, Go, Rust, Java, C, C++, Shell) enforcing 100% symbol recall on every release
• Java, C, C++, and header-file (.h) support in the AST Repo Mapper (regex extractors with control-flow keyword guards)
• Interactive Context Playground & ROI Calculator on the GitHub Pages docs, with a 9-language full-source-vs-repo-map split viewer

Fixed

• ctx bench --json no longer leaks the full untrimmed repo map into its output
• TokenBudgeter.trim_to_budget no longer overshoots the requested token budget when appending its truncation banner
• AST signature extraction now includes positional-only, keyword-only, *args, and **kwargs parameters (previously silently dropped)
• Decorator extraction is no longer limited to a hardcoded allowlist — @x.setter, @app.route(...), and other real-world decorators are now preserved
• Tuple-unpacking constant assignments (e.g. A, B = 1, 2) are now extracted
• ctx bench --golden now honors --dir / --budget instead of silently ignoring them
• .agents/memory/* files and directories are now created with secure permissions atomically, removing a brief world-readable TOCTOU window
• Git status parsing now correctly handles quoted/spaced filenames and renames (git status --porcelain -z)
• --budget rejects zero/negative values with a clear usage error instead of silently producing broken output
• Golden benchmark symbol-recall check no longer reports false positives when a symbol is renamed to something that merely starts with the old name
• ASCII benchmark report box borders now render aligned regardless of emoji width or digit count

Full Changelog: https://github.com/g1mn/agyswap/blob/main/CHANGELOG.md#040--2026-08-28