CAK-04: Git-Z Path Facts Scanner Prototype

[skulmakov-oss]

Parent tracker: #28
Depends on: #31

CAK-04: Git-Z Path Facts Scanner Prototype

Purpose

Create the first byte parser for Git-Z path facts in the Cerebral Admission Kernel track.

The goal is to read NUL-delimited Git path output as bytes and produce deterministic path facts for later scope checks.

Scope

The prototype should parse byte input and produce path facts for common file states:

• added;
• modified;
• deleted;
• renamed;
• untracked.

The parser should preserve path bytes and avoid treating paths as UTF-8 text in the hot path.

Expected implementation direction

Possible module:

• crates/ccl-core/src/axon_git.rs

Possible concepts:

• PathFact
• PathOperation
• parse_git_z_path_facts

Names may differ if they fit the codebase.

Required tests

• modified path;
• added path;
• deleted path;
• untracked path;
• renamed old/new path;
• path with spaces;
• byte path that is not valid UTF-8;
• malformed or incomplete record behavior is deterministic.

Explicit non-goals

• No Git command execution in this seed.
• No current scope checker replacement.
• No admission authority change.
• No unified diff parser.
• No SIMD.
• No parallelism.
• No regex.
• No GitHub CI as evidence.

Acceptance criteria

Close this issue when a PR is merged that adds a focused Git-Z path facts parser with tests, keeps existing gate behavior unchanged, and does not replace current scope or admission authority.