Filter bash output through rtk before it reaches the model

Register a PreToolUse hook on Bash that rewrites each command through rtk, so `git status` runs as `rtk git status` and the output is compressed on the way back. The rewrite is transparent; commands are still written normally. Measured on this repo, a full `git diff HEAD~3` drops from 521 KB to 28 KB, a recursive grep over app/src/main from 117 KB to 19 KB, and `git log -20` from 20 KB to 5.3 KB. Small outputs grow marginally because rtk adds a header, which at those sizes is not worth avoiding. The container starts empty, so a SessionStart hook installs the binary first. It pins RTK_VERSION because the installer's default is to resolve the latest tag through api.github.com, which the proxy answers 403 for every repository but this one. Outside the sandbox the hook installs nothing and only prints the command to run, and every failure path exits clean: with rtk absent the rewrite no-ops and the only cost is verbose output. Verified that rtk leaves what must not change alone -- `rtk read` returns GameSetupScreen.kt byte-for-byte, commit messages keep their quoting, and already-rewritten commands are not wrapped twice. Co-Authored-By: Claude Opus 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01Urn6eEBA6XzrnfoibL7faC
2026-08-08 04:30:36 +00:00
parent f53a628c7a
commit af6f27cf60
4 changed files with 122 additions and 0 deletions
@@ -0,0 +1,13 @@
+# Project-local RTK filters — commit this file with your repo.
+# Filters here override user-global and built-in filters.
+# Docs: https://github.com/rtk-ai/rtk#custom-filters
+schema_version = 1
+
+# Example: suppress build noise from a custom tool
+# [filters.my-tool]
+# description = "Compact my-tool output"
+# match_command = "^my-tool\\s+build"
+# strip_ansi = true
+# strip_lines_matching = ["^\\s*$", "^Downloading", "^Installing"]
+# max_lines = 30
+# on_empty = "my-tool: ok"