agent: builder model: opus max_turns: 50 budget_usd: 10 —
t.clone() for an optional handed over and read againScore: y18’s Found: (f0ae806e): a help line that suggests code the compiler refuses. Small, one file plus a test; built here because this lane found it and the next steps (y3, y19) do not touch check_takes.nika. It changes crates/, so the gate of .claude/agents/builder.md applies in full (a change to tools/check_*.nika also runs target/fast/nikaia test --both-settings --project tests/compiler), and it raises the toolchain version (the supervisor’s: write the Changelog: line, touch no version). Read docs/builder-facts.md and git show f0ae806e -- crates/nikaia-std/src/tools/check_takes.nika (the guard’s refusal already writes ?.clone() for an optional, check_takes.nika:377-380).
The plain-call NK2105, data_handed_over_is_used_again (crates/nikaia-std/src/tools/check_takes.nika:414), writes If both need it, hand over a copy: `{name}.clone()`. whatever the type; t.clone() on a T? is refused, t?.clone() is the copy that compiles. Probe: a fn keep(t: Node?) -> String that binds t in a match arm, called twice with the same t: Node? in main. Today: NK2105 at the second call, help `t.clone()`. Wanted: `t?.clone()`.
t?.clone() in the probe really compiles and runs (if it does not, stop: Result: blocked, Found: with the probe).data_handed_over_is_used_again, write the copy as the repeat-frame refusal does (?.clone() when the type’s text ends with ?); one shared helper for both sites if it reads better. Regenerate the lowered twin as docs/builder-facts.md says.tests/compiler/tests/takes_an_optional_handed_over_twice_says_its_copy.nika + .stderr, failing on the unfixed binary. An existing .stderr whose help rightly changes is updated and named in Body:.Fixes #1056.The test passes and fails on the unfixed binary (say so under Tests:); NIKAIA_CACHE_LIMIT=2G target/fast/nikaia test --both-settings --project tests/compiler > out.txt 2>&1 green; the package gate below green; pushed. Files you may change: crates/nikaia-std/src/tools/check_takes.nika, its lowered twin crates/nikaia-std/src/tools/lowered/check_takes.rs, the new test with its expected output, existing tests/compiler/tests/*.stderr whose help line rightly changes.
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.std or the toolchain lacks stops the work: no code around it unless an ADR or Part I-III refuses it (name it). Else Result: blocked, Found: gap + probe, Needs: owner decision (CLAUDE.md, A missing form stops the work).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.Pushed: line names the pushed sha. A report without a Pushed: line, or with a placeholder left in (TC, DISK), is not done and cuts the batch (k3a1 2026-10-29: Result: done, nothing committed).NIKAIA_CACHE_LIMIT=2G target/fast/nikaia test --project packages/yaml green, and cargo test --profile fast -p nikaia --test it -- fmt::every_nika_file (it formats every .nika under packages/). For a change only under packages/yaml/ this is the gate the line above asks for; a change under crates/ runs the gate of .claude/agents/builder.md (#852) as well. target/fast/nikaia is built by the session hook; if it is missing, cargo build --profile fast -p nikaia once.Changelog: none, unless the brief changes crates/.Files not to touch: anything outside packages/yaml/ and the brief’s own report, unless the brief names it; never docs/briefs/batch.txt or a brief of another lane.
max_turns: commit and push every finished step, then report Result: partial with what is left under Needs:. Uncommitted work at the end is lost work (y4 ran out at 110)./home/user/Nikaia/docs/briefs/yaml/y20-optional-copy-help.md.report.md)Fields of docs/architect.md, Briefs and reports: Result: done|noop|partial|blocked (the bare word alone on that line: Result: done, never a summary after it, which cuts the batch, b869a 2026-10-27; Owner: is a question for the owner or none, never a role), Files, Commit, Body (optional, one paragraph for the commit message), Fixes, Pushed, Tests, Gate (green|red), Deviation, Found, Needs, Changelog, Owner, Disk freed, and for a move Rs2nika: (the kept N of M lines of rs2nika --score, then the three costliest hand edits; none for a task that moves no Rust, none (redesign) for a brief with Shape: redesign and no Convert: line). 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); a process event such as another session resetting or rewriting your files is no Found:, it goes under Needs: (m3a 2026-10-28); a converter draft that came out wrong is no Found:, it is one of the costliest edits under Rs2nika:, which the converter lane reads (e12-4b 2026-10-27); how you solved your own step goes into the commit message. Deviation: is only a step of the brief built otherwise than written or not built (a choice the brief left to you, such as keep what X needs and say so, is no deviation: it goes into the commit message; nor is building two steps in one commit when every step is built, e12-3a 2026-10-27, nor a step another commit on develop already built, shown by your test failing with that commit’s change reverted, b889 2026-10-27: name the commit in Body:, nor a test’s expected .stdout/.stderr taken from what the program really prints where the brief’s sketch of it was short or wrong, b934 2026-10-29: say so in Body:, nor a lowering that follows the ADR governing it where the brief’s expected lowering contradicts that ADR, b933 2026-10-29: name the ADR in Body:, nor a lowering other than the brief’s where rustc cannot take the brief’s, b1029 2026-10-31: say why in Body:, nor re-keying an allow-list entry (KNOWN) whose hash changed for the same program and the same reason, b-fixforward-sweep2 2026-10-28: say so in Body:, nor an existing test’s expected .stdout/.stderr updated because your change rightly changes the message it prints, b1012b 2026-10-31: name the test in Body:); how you verified (e.g. a test not run against the unfixed compiler) goes under Tests:. 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_01UVxJDveRM5qKZKyCqq6Y24