docs: correct three package and editor docs against source

[lex00]

Third slice of the docs audit, finishing the previously-unread files: editors/, packages/* READMEs, posts/, and docs/design/.

Both editor READMEs advertise a feature that does not exist

vscode and zed each list:

• Code actions — quick fixes from chant lint rules

No shipped lexicon implements codeActionProvider, so the language server never advertises the capability. Loading all twelve and asking:

plugins loaded: 12
completionProvider advertised: true
hoverProvider advertised: true
codeActionProvider advertised: undefined

The seam is real and core dispatches through it (#1349) — nothing fills it. Both READMEs now say that plainly rather than promising the feature.

test-utils README

• "Designed for Bun's test runner." Not one bun:test import exists in the package; every module imports from vitest, which is what the repo runs.
• A table row truncated mid-cell: | `examplesDir` | `string` | Directory to scan (use `import.meta.dirname| — missing the closing backtick, the paren and the final pipe, so the table renders broken.
• Documented 3 of the package's exports. describeObservationConformance is the observation contract's enforcement half (fix(core): observation contract — "not observed" is silently "not present" #1089), run by seven lexicons and extended in Lexicon contract: ownership marker channel is an obligation with no declaration and no check #1348 — a reader looking for it would not have found it here. Added, along with a table covering the mock factories, the static observation helpers, and the temp-directory utilities.

SPRAWL-VALIDATION.md — four broken links

Link	Problem
../../../../../examples/gitlab-aws-alb-api/src/pipeline.ts	one ../ too many
./pilots/pilots-e2e.test.ts ×3	a filename that has never existed; the tests described are in pilots.test.ts
./verbs/apply.ts	createLambdaDeployCapability lives in lexicons/aws/src/components/apply.ts

Verified clean

• packages/k8s-client/README.md — chant kube is real (the k8s plugin's commands() returns kubeCommandGroup()), the optional dependency is declared as claimed, and the "never importable from the build path" claim is backed by examples/k8s-client-boundary.test.ts
• packages/core/src/components/README.md — chant graph --stacks is a real flag
• relative links in the remaining package, post and design docs all resolve

posts/ and docs/design/ are point-in-time narrative documents, so I checked their links and commands rather than treating drift from current behavior as an error.

🤖 Generated with Claude Code

https://claude.ai/code/session_01Jp6SP7ZiavhoEB1AFuwwoJ