Rewrites the brainstorm and plan from scratch as v2 docs after the
first real run on cora PR #2382 surfaced that v1's delta-shape didn't
match the user's verb. v2 is a two-phase re-brainstorm + re-plan flow
that always produces a from-main plan; original artifacts are
preserved by reference.
- Add v2 brainstorm at docs/brainstorms/2026-05-06-ce-replan-skill-rebrainstorm-requirements.md
(revision: 2, supersedes the v1 brainstorm). 19 requirements
organized around the two-phase shape, R-ID stability rule,
fork-not-mutate discipline, and from-main baseline.
- Add v2 plan at docs/plans/2026-05-06-002-replan-ce-replan-beta-beta-plan.md
(type: replan, original_pr: 785, supersedes the v1 plan). 7
implementation units; cherry-pick guidance for v1 code that
survives.
- Mark v1 brainstorm and v1 plan as superseded with pointers to the
v2 docs. v1 docs retain their v2-Shape audit trail as historical
context for the design transition.
The user's correction that drove the rewrite: "no it replan so start
from main no base don we redo the full plan" (cora session
10b929fb-c03f-4daf-b675-32c00ac44b43, 2026-05-06).
Kieran Klaassen
4722057e77