Compound learning: the claude-code-cli-acp bridge returned 'Not logged in'
despite a working claude -p, due to (1) a too-thin spawn env (needs XDG_*/USER/
SHELL beyond HOME/PATH) and (2) macOS login-Keychain session isolation for
detached/headless processes. Six headless tasks misdiagnosed it as an upstream
gap. Cross-linked from the ACP runtime integration pattern doc.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
handlePlan charged the budget but never checked the ceiling or set the
flag, so a plan-ONLY stream kept emitting after crossing the cap (caught by
both review bots). It now flags + truncates exactly like text/thinking.
Adds the plan-only flood regression test (185 total) and the category
frontmatter field to the new solutions doc.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
