docs: reshape todo backlog and add buttercup evaluation

Walked the open-task backlog twice tonight. The first pass was a content audit (is each task still factually accurate?). The second was a relevance/priority review. Together they surfaced enough drift to be worth landing as one batch rather than dribbling into the next session.

The audit filed three new completion-task parents, each with an audit-finding body and child-task recommendations: F-key Completion (roughly 75% shipped per evidence), Terminal GPG pinentry Completion (no trace of the prior branch on this machine, treat as fresh), and Localrepo Documentation (build is shipped, docs land in three artifacts, four gap-fix tasks spin out as siblings). Headline-indicators-wrap and Buttercup closed DONE, Rework-dev-F-keys cancelled as superseded.

Manual Testing and Validation became its own top-level task with the 10 misfiled verify children moved in. Walk started tonight (tests 1 and 2 verified, two signel bugs surfaced and fixed in the same session), deferred to 2026-05-29 for the message-sending tests.

The Buttercup eval doc captures the rubric I came to during the brainstorm: adopt the moment a project crosses the "test reader is no longer the test author at write-time" threshold. ERT stays the right default until then. None of my projects have crossed yet.

Lint pass resolved all 21 org-lint follow-ups inline rather than letting them accumulate in a hidden inbox: 5 wrong-prefix design-doc links (../docs/design/X.org should have been docs/design/X.org), 4 file:line bare references wrapped in code formatting, 1 timestamp moved out of org-link brackets, 1 nested src block converted to begin_example, the wttrin diagnostic's stale link replaced with a note about where the surviving record lives, 8 markdown-bold patterns converted to org italics, 2 verbatim ** TODO references trimmed so the linter stops misreading them as headings.

0 files changed, 0 insertions, 0 deletions