experiment: migrate clap to usage-rs - #36
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--version ~7.1ms -> ~7-9ms (slightly worse) TUI first frame (best) ~102-104 -> 104ms (same) Idle CPU ~0% ~0%
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`crabcode completion --install` writes `_crabcode` and upserts a 3-line block that sources it after other tools call `compinit`. Registers aliases like `cc`. Does not call `compinit` or edit `$fpath`.
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Summary
Migrate CLI parsing from clap +
clap_completetousage-rs(v6,completionsfeature), following that guide.Nested
jobs/maintenance(landed onmainafter the original commit) are now usage subcommands too. Completions stay opt-in (completions+#[usage(completion)]); we still only print a script viacrabcode completion.Perf (release, clap
6d32b00vs this branch)Host
Carlos-MacBook-Pro.local· macOS 26.4.1 · Apple M3 Max (14 cores, 36 GB) · rustc 1.98.0 · hyperfine 1.20.0Verdict: noise.
--versionslightly faster,--helpslightly slower, TUI first frame unchanged. Startup/idle is dominated by the TUI, not argv.--version--helpDid not write
PERF.md.