[EPIC] FastWalker

[kirich1409]

Context

FastWalker protocol + FastWalkerImpl using getattrlistbulk(2) with parallel walk across projectRoots (bounded 4-8). Public defaultExcludedBasenames / defaultExcludedPathPrefixes composable sets. ProjectMarker sum-type with .predicate case.

Goals

• FastWalkerImpl via open(O_DIRECTORY) + getattrlistbulk.
• Parallel walk with bounded task group (4-8).
• ProjectMarker supports file / directory / glob / predicate.
• defaultExcludedBasenames + defaultExcludedPathPrefixes composable.
• Canonicalise each descend (realpath) before prefix-check.

Child tasks

Will be added as sub-issues after task batch.

Exit criteria

• AC-20 passes (exclusions + prefix).
• AC-30 passes (bench <5s on 100k files on Apple Silicon SSD).

Related documents

n/a