Six findings from probing the world before tree-sitter / diff / project
tree implementation lands:
B1. `git` subcommands through executor.exec emit ANSI color + DEC
keypad/line-clear escapes by default (forkpty enables interactive
mode). `:diff` impl MUST use `git --no-pager --color=never <args>`.
Same flags apply to any future git verbs.
B2. SSE chunk size envelope: local llama.cpp delivers tiny chunks
(median 4 chars, max 13) AND splits code fences across boundaries
(`'``'` then `'`'`). Cloud (Anthropic via OpenRouter) delivers
big chunks (median 26 chars), fences intact. The §4 fence-aware
filter accumulator design covers both — confirmed necessary by
local-model behavior.
B3. **LuaJIT io.popen():close() does NOT return exit codes** — Lua
5.1 contract, not 5.2+. Breaks the A4 highlighter resolution.
Revised: route via `executor.exec("cat tmp | tree-sitter ...")`
which uses pty.spawn + waitpid and returns (out, code) reliably.
B4. tree-sitter CLI absent on both probed hosts (noether, higgs).
Highlighter is opt-in by design; absent-CLI path should emit a
clear install hint, not silently no-op.
B5. Project-tree envelope: aish 32 files / 449 chars; similar local
repos 15-25 files; scan time ~1-5ms. The 4096-char default cap
accommodates ~290 typical paths. Large repos handled via
tree_depth or cap tuning per existing §9 risk row.
B6. os.tmpname returns POSIX /tmp/lua_XXXXXX paths; acceptable for
the B3-revised tmpfile-roundtrip pattern.
No structural changes to formulate/analyze. B1, B3, B4 will fold into
PHASE6.md §4 / §5 / §1 during plan.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
