agent: builder model: sonnet max_turns: 60 budget_usd: 8 —

Brief: fix-forward, the script tests run the toolchain that tests them (develop red)

Score: red develop first (CLAUDE.md): main stands still until this lands. Test-only change: no version raise, no Changelog.

Facts (checked by the architect on CI run 40359579581, de7c3d3d)

Jobs bootstrap_compiler and arm64 fail in nikaia_test::the_compiler_test_package_passes_at_both_settings: 104 passed; 4 failed (earlier 98 passed; 2 failed, before batch_lines and drive_actions were added). Locally, with target/fast/nikaia present, all 110 pass: that is why the earlier fix-forward (b-fixforward-compiler-tests.md) did not reproduce it.
The four tests take the binary from a fixed path that CI does not build (CI builds target/release): tests/compiler/tests/agent_script.nika:19, batch_frontmatter.nika:27, batch_lines.nika:22, drive_actions.nika:24: let nikaia = process::run("realpath", [f"{repo}/target/fast/nikaia"]).stdout.trim().clone()
Their root() already finds the checkout from the process that runs the test: readlink /proc/$(cut -d' ' -f4 /proc/$PPID/stat)/cwd (the parent of the test program is the nikaia running nikaia test).

To build

In each of the four files, take the binary of that same process: readlink /proc/$(cut -d' ' -f4 /proc/$PPID/stat)/exe, as a function toolchain() beside root(). If its file name is not nikaia (the test was started otherwise), fall back to the first that exists of {repo}/target/release/nikaia, {repo}/target/fast/nikaia. No other change to the tests’ output.
Probe, CI’s situation, before and after the change (S = a scratch dir of yours): cp target/fast/nikaia $S/nk && mv target/fast/nikaia target/fast/nikaia.off, then NIKAIA_CACHE_LIMIT=2G $S/nk test --both-settings --project tests/compiler (before: the 4 fail; after: all pass), then mv target/fast/nikaia.off target/fast/nikaia (always, also on failure: other sessions use it).
Also cargo test --profile fast -p nikaia --test it -- nikaia_test::the_compiler_test_package. Commit tests: the script tests run the nikaia that tests them, not target/fast (CI red since 6370390).

Files you may change

The four .nika files above (their .stdout only if a line truly changes: say why under Deviation). Anything else: stop and report under Needs. Known facts: read docs/builder-facts.md.

Rules (CLAUDE.md; this block is pasted into every brief, also a fix-forward)

Read docs/builder-facts.md first. develop in the main checkout; git status at start: other agents’ uncommitted files are not yours, never touch or stage them.
git add <files> only; commit after each step; git push origin develop fast-forward, no rebase (rejected: report Pushed: rejected, go on committing).
Before pushing: cargo fmt, cargo clippy --all-targets -- -D warnings, scripts/pre-push-check.sh, and the gate of .claude/agents/builder.md (#852).
No version lines, CHANGELOG.md, badges; no new NK code. New tests in Nikaia only; never the full suite. No foreground sleep, no polling; scripts in files.
Disk: NIKAIA_CACHE_LIMIT=2G; at most two clones with target/ in the machine; delete your own clone’s target/ and target/release/nikaia-scratch at the end; report GB freed.

Report (at most 15 lines, to exactly `/home/user/Nikaia/docs/briefs/b-fixforward-script-tests.md.report.md`)

Fields of docs/architect.md, Briefs and reports: Result: done|noop|partial|blocked (the bare word first; Owner: is a question for the owner or none, never a role), Files, Commit, Fixes, Pushed, Tests, Gate (green|red), Deviation, Found, Needs, Changelog, Owner, Disk freed. none where nothing, and then the bare word: Deviation: none (a note) cuts the batch (batch.nika compares exactly); a note goes into the commit message. A noop says why under Tests: (what was probed), not under Deviation:. Final answer, one line: done <sha>, report <path> (or BLOCKED: ... / PUSH REJECTED ...).

Attribution: Co-Authored-By: Claude Opus 5.5 noreply@anthropic.com Claude-Session: https://claude.ai/code/session_01GFeMqxRbtUMiGVyDMxsvEq

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