Bash Tool Output Compressor / Claude Code v2.1.80

What

An intelligent output compression system that recognizes common CLI commands and summarizes their verbose output to save context window space.

Details

Automatically detects command types by parsing the shell command and applies type-specific compression:
git status: Strips hint lines, collapses clean repos to "clean"
git diff/show: Summarizes per-file with +N -N counts, truncates hunks
git log: Limits line length and total output
git branch: Groups local/remote, deduplicates
git commit/push/pull: Extracts only key status lines
Test runners (pytest, jest, vitest, cargo test, go test): Extracts pass/fail summary and failure details
Linters/type checkers (tsc, eslint, ruff, mypy, clippy): Keeps only error/warning lines
Package managers (npm/pip/brew install): Strips download progress noise
grep/rg: Restructures into N matches in M files with per-file groupings
ls -l: Strips metadata, shows dir/ and file size format with extension summary
cat/file reads: Truncates long files, keeps definition-like lines
JSON output (gh api, etc.): Prunes boilerplate URL fields (followers_url, repos_url, etc.)
Docker/kubectl logs: Deduplicates repeated log lines
Tables (docker ps, kubectl get, psql): Limits row count
Handles piped commands (e.g., cmd | head -5) and compound commands (&&, ;, ||)
Only compresses when savings exceed a minimum threshold

Evidence

Command classifier and compressor system (search for "git-status", "git-diff", "test", "error-only" as case labels in the switch statement)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.