[viztor]

Phase P1b of docs/improvement-plan.md, restacked onto 1.8.1. Supersedes #107, which GitHub closed when its stacked base branch was deleted with #106's merge.

What it does

• src/adapter-replacement.ts and its test are gone. Nothing in src/ imported it — the map said so and the architecture walk agreed — so it was the next step written down as if it were live behaviour.
• utils/ is now closed against the clock and the console. The gate forbids fetch, console, and a global timer (called or passed as a value, bare or through globalThis./window./global./self.), and a relative import that resolves outside the folder. utils/retry.ts was the offender: its default sleep reached a global timer and its warning reached console, so it now takes both from the caller (backoffOver(timer), warn).
• .freebuff/project-id is deleted and the directory ignored. A tool's local project id had been committed; it is not source, and it is not anyone else's business.
• The test support files moved under test/support/ — catalogs.ts (the synthetic catalogue fixture) and src.ts — so the fixtures a test imports are named as support rather than as a second kind of test.
• The gates tightened: the lint warnings the tree had been carrying are addressed, and the docs that describe the utils/ rule now describe the rule the test enforces.

Restack note

Rebased the branch's net change onto 1.8.1, then completed the two file moves patch cannot express: the rename test/fixtures/catalogs.ts → test/support/catalogs.ts, and the two adapter-replacement files removed rather than emptied.

Verification

gate	result
unit suite	1363 passed / 85 files (+15)
test:mock	52 passed
vp check	0 errors, 21 warnings (was 23)
scripts/check.ts	passes
coverage	96.52% statements / 92.54% branches, above the ratchet