agent: builder model: sonnet max_turns: 50 budget_usd: 6 —
String parameter pushed into a mut Vec[String] parameter)Score: bug lane, S=3 cheap: the defect no longer reproduces (architect probe on 5aebafd, target/fast/nikaia run), but no commit names #706 and no test pins it. Test-only: no version raise, Changelog: none.
The checker accepted, rustc refused (lifetime may not live long enough): fn words(s: String, mut v: Vec[String]) { for w in s.split(" ") { v.push(w) } } lowered to fn words(s: &str, v: &mut Vec<&str>). Same with split_once parts. Today both run: probe A prints 3, probe B prints 6 then 1; the .stdout holds the real output.
Probe A: words above, main does let mut v: Vec[String] = [], words(f"a b {1}", v), println(v.len()).
Probe B: fn parts(s: String, mut v: Vec[String]) { let (a, b) = s.split_once("=") ?? ("", ""); v.push(a); v.push(b) }, called with f"k={1}" and with the literal "x=y", plus a for w in "c d".split(" ") { v.push(w) } in main; print v.len() and v[1].
tests/compiler/tests/: views_of_a_parameter_pushed_into_a_vec_parameter.nika (probe A) and split_once_parts_pushed_into_a_vec_parameter.nika (probe B, literal and f-string callers), each with its .stdout (the real output). Copy the layout of a neighbour test there.NIKAIA_CACHE_LIMIT=2G target/fast/nikaia test --both-settings --project tests/compiler (all pass), and cargo test --profile fast -p nikaia --test it -- nikaia_test::the_compiler_test_package.Result: blocked, the rustc error under Found:; do not fix the compiler in this brief.tests: views of a parameter pushed into a Vec parameter run (Fixes #706).Only the four new files above. Known facts: read docs/builder-facts.md.
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).cargo fmt, cargo clippy --all-targets -- -D warnings, scripts/pre-push-check.sh, and the gate of .claude/agents/builder.md (#852).CHANGELOG.md, badges; no new NK code. New tests in Nikaia only; never the full suite. No foreground sleep, no polling; scripts in files.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./home/user/Nikaia/docs/briefs/b706-views-into-param-vec.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. Found: is only for a defect outside your change (it cuts the batch); how you solved your own step 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