agent: builder model: sonnet max_turns: 60 budget_usd: 10 —
Blocks: k3b-comptime-bundle.md
Score: compiler bug, a lowering rustc refuses (E0599) in every tools/*.nika that calls a trait method of the prelude; it blocks the K3b move (Duration.in_nanos() on fs::Metadata::modified()). Small and traced.
Facts: Where things live, Traps already met, Commands
A tools/*.nika call to a prelude method that lives on a trait (d.in_nanos(), 5.seconds(), b.since(a), x.low_bits(n), a ListExt method) lowers to the bare method call; the tools package’s preamble does not import the trait, so rustc gives E0599. A plain nikaia run program works: its prelude (crates/nikaia-std/src/lib.rs :720-737) brings DurationExt, DurationIn, InstantSince, LowBits as _, ListExt.
Probe: a tools function such as pub fn stamp(p: fs::Path) -> i64 throws { fs::metadata(p).modified().in_nanos() } in a crates/nikaia-std/src/tools/*.nika, lower-std, then cargo check -p nikaia-std --features compiler: E0599 no method named in_nanos. (Remove the probe function before committing.)
crates/nikaia/src/sysroot.rs, lower_tools_files_cached, the preamble at :768-775: it imports only Full, panic, Bytes, ByteCopy as _, ByteReads as _. Each mod X_lowered reaches them by its glob of the parent.
Tests:.nikaia_std::time::{DurationExt as _, DurationIn as _, InstantSince as _}, nikaia_std::num::LowBits as _, nikaia_std::list::ListExt as _ (check each path against lib.rs), with a comment naming Part I 1.3 like the Bytes line. Name in Body: any other trait of lib.rs’s prelude you find the tools lack. Then lower-std (every lowered file changes only in what the preamble is: lowered.rs) and cargo check -p nikaia-std --features compiler with the probe function present, then without.tests/compiler/tests/tools_prelude_traits.nika + .stdout that writes a one-file tools package calling in_nanos() and since(..) into a temp dir and has the toolchain lower and build it through process::run (as a_trait_column_change_warns.nika drives nikaia build), if a command lowers a tools dir that is not the sysroot. If none does, there is no Nikaia path to the preamble: commit step 2 alone, and say Found: no Nikaia test reaches the tools preamble (that is the defect to file, not yours to work around).
Commit sysroot: the tools preamble brings the prelude's method traits (Fixes #1077).The probe compiles through cargo check -p nikaia-std --features compiler; lower-std fixpoint clean; the test (or the Found of step 3); build, fmt, clippy, pre-push-check.sh; committed locally. Changelog: one line.
An edit is needed outside crates/nikaia/src/sysroot.rs, the lowered files lower-std rewrites, and the new test; an error in another agent’s file.
Not yours, never stage: every file git status shows modified or untracked at your start, and every docs/briefs/* file except your report.
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 (scripts/commit.nika -- REPORT does it); commit locally after each step and never push: the driver runs the complete suite and pushes (.claude/agents/builder.md, Cheap checks only; owner, 2026-10-31).cargo build --profile fast -p nikaia, lower-std and its fixpoint when a tools/*.nika changed, cargo fmt, cargo clippy --all-targets -- -D warnings, scripts/pre-push-check.sh, the tests the brief names and the ones your change touches. No gate.nika.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: architect 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.Result: partial with what you ruled out, the probe, and the suspected file and function (.claude/agents/builder.md).target/fast/nikaia run scripts/commit.nika -- REPORT, which writes Pushed: local <sha> into it. 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)./home/user/Nikaia/docs/briefs/bugs/b17-1077-tools-preamble-traits.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_01GFeMqxRbtUMiGVyDMxsvEq