Implement the 1 empty function body in specs/test_framework/graph_drift_detection.t27

[gHashTag]

Implement the 1 empty function body in specs/test_framework/graph_drift_detection.t27

Context

specs/test_framework/graph_drift_detection.t27 is 650 lines long. 1 of its functions is declared with a body that holds no statement - a signature and a comment where the implementation belongs.

.t27 is the hand-authored source language. t27c compiles it out to C, Rust, Verilog and Zig. You are writing source, not compiler output, and not prose about an implementation.

Current state - re-run these yourself

$ cd /Users/playom/t27
$ t27c gen specs/test_framework/graph_drift_detection.t27 2>&1 | grep -c 'not yet implemented'
1
$ t27c spec-status specs/test_framework/graph_drift_detection.t27
NOPARSE

Use t27c, not the t27c on PATH: the PATH build prints no parse metrics at all, so the grep above returns nothing and an empty result reads as a pass.

What to write

Keep every signature exactly as it is - the signature is the contract. Quoted verbatim from the file:

1. line 77 - fn default_drift_config() -> DriftConfig

The file already has 0 test block(s). Add one for each function you implement; a body with nothing asserting on it is a claim, not a result.

Acceptance criteria

• 1. t27c gen specs/test_framework/graph_drift_detection.t27 > /tmp/t27-gen.zig && grep -c 'not yet implemented' /tmp/t27-gen.zig prints 0 (today: 1)
• 2. t27c spec-status specs/test_framework/graph_drift_detection.t27 does not print NOPARSE - the file still parses. (This replaces a parse-metrics criterion. The compiler in the container prints no such metrics, so the command printed nothing and no work could ever satisfy it.)
• 3. with criterion 1 satisfied, all 1 name above still exist: grep -cE '^\s*(pub )?fn (default_drift_config)\(' specs/test_framework/graph_drift_detection.t27 prints 1
• 4. grep -cE '^[[:space:]]*test[[:space:]]+("|[A-Za-z_])' specs/test_framework/graph_drift_detection.t27 prints at least 1 (today: 7)

Boundary

specs/test_framework/graph_drift_detection.t27

[gHashTag]

Re-filed as #4372.

An attempt claimed this issue on 2026-09-17 and left an empty branch. A dispatch row that has spent its retry ceiling is released once and then keeps its issue for good, which is the right rule for a third identical failure and the wrong outcome for an issue nobody ever attempted twice. The new issue carries the same work, the same boundary, and today's brief.

Closing this one so the swarm can take the work again.