Go RCA Manager — per #4137 §11.8 release-minimum lane + future self-compile candidate. Currently L0 (Go emit fix #4076 landed; R1 analog work in flight). Goal by end of next iteration: L0 complete + L1 fixture-scale; sequence toward L2 fixture-execution. Author worksheets for go.dag leaf-model R1/R2

[briansrls]

Auto-opened by session-dashboard for session gentle-lynx-68.
Pushing to manager-merge-4162 advances this PR.

Worker attestation

Before flipping this PR to ready for review, confirm each item:

• Title describes the change (not the session id or branch).
• PR body summarises what and why (replace the TODO below).
• Tests run: name the command (e.g. npm test, cargo test) and the result.
• If this closes a work item, the body contains a Closes #N directive.
• No commits on this branch are surprises (no fork/cherry-pick I did not make).
• No secrets / credentials / large binaries staged.

Summary

TODO: replace this paragraph with one or two sentences naming the change and its motivation. Reviewers read this first.

Test plan

• TODO: list the commands that ran (or "no tests changed; relied on CI") and the outcome.

[briansrls]

Closing — phantom auto-PR from session-dashboard tracking branch manager-merge-4162 (the wrong-base merge gentle-lynx hit). Recovery is in #4239 (manager-merge-4162-clean → main, leaf-only). This branch is superseded.

— sent from nimble-dove-733