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docs(design-system): correct the handover from the first session that used it - #1673

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docs(design-system): correct the handover from the first session that used it#1673
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claude/ds-handover-corrections

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@BigSimmo BigSimmo commented Aug 7, 2026

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Summary

Docs only. The first session handed HANDOVER-2026-08-07.md found four defects in it and one hazard it omitted. All five were re-verified against origin/main before being written back.

Corrections

  • refactor(tokens): migrate production letterspacing onto the named scale #1669 was listed "open at handover"; it merged as b557a26b8. Any status line in a handover is stale the moment it is written, so §1 now instructs re-measurement rather than quotation — the staleness figure itself drifted 111 → 129 commits in two days.
  • "two source sites already carry workaround comments" was an undercount. There are five comments across four files. A literal grep for tailwind-merge finds only three, because two say "plain join" and "concatenates" instead. The fifth — mode-home-template.tsx:106 — does not merely comment: it strips stray justify-* tokens from incoming className, so twMerge would make that workaround redundant or double-handle it.
  • "~200 importing files" understated the blast radius. cn( is called 1 888 times across 188 source files; 210 files reference ui-primitives.
  • Records that this needs tailwind-merge v3.x (v2 targets Tailwind 3; the repo is on tailwindcss ^4.3.1), and that neither tailwind-merge nor clsx is currently a dependency.

The omitted hazard, now the headline of A1

Stock tailwind-merge classifies an unknown text-<x> as a text colour. This repo's @theme defines scales it has never seen — text-2xs, text-3xs, the five tracking-* roles, min-h-tap / h-tap / w-tap, size-icon-*, thirteen shadow-*, custom radius-* and leading-*. So cn(eyebrowText)text-2xs … text-[color:var(--text-muted)] — would have either its size or its colour silently deleted, shipping a regression across the whole kit with no type or lint signal.

The deliverable is therefore the extendTailwindMerge config, not the cn() body. §4 now says so, names the two hazard classes to audit first (order-reliance, custom-token misclassification), and instructs baselining the three known Windows failures before touching anything — without a before-shot, "unchanged, not mine" is an assertion rather than proof.

Prompt fix (§9)

That session stalled before step 0, asking whether git fetch fell inside the provider-confirmation boundary. It read the earlier wording correctly — "do not touch … any provider-backed workflow without asking" plainly covers a fetch. But the boundary exists for spend, mutation and production risk, and a read-only fetch carries none of them. §9 now pre-authorises git fetch, worktree creation off latest origin/main, and a single-package npm install by name, while keeping the real gates (OpenAI, Supabase, hosted-CI mutation, npm ci, deploys, production data). The paragraph explaining why it exists is included so it is not trimmed away as redundant later.

Verification

  • npm run docs:check-links — exit 0
  • npm run format applied

No source, test or config file is touched, so no behavioural gate applies.

RAG impact: no retrieval behaviour change — documentation only. No file under src/lib/rag/**, clinical-search, retrieval-selection, ranking-config, answer-ranking, the eval harness, or the golden fixture is modified.

🤖 Generated with Claude Code

… used it

The session handed this file found four defects in it and one hazard it omitted.
All five verified against origin/main before being written back.

Corrections:
- #1669 was listed "open at handover"; it merged as b557a26. Any status in a
  handover is stale the moment it is written, so §1 now says re-measure rather
  than quote — the staleness figure itself drifted 111 -> 129 commits in two days.
- "two source sites already carry workaround comments" was an undercount. There
  are five comments across four files; a literal grep for "tailwind-merge" finds
  only three, because two say "plain join" and "concatenates". The fifth,
  mode-home-template.tsx:106, does not merely comment — it strips stray
  `justify-*` tokens, so twMerge would make that workaround redundant or
  double-handle it.
- "~200 importing files" understated the blast radius: `cn(` is called 1 888
  times across 188 source files, and 210 files reference ui-primitives.
- Records that this needs tailwind-merge v3.x (v2 targets Tailwind 3; the repo is
  on tailwindcss ^4.3.1) and that neither tailwind-merge nor clsx is a dependency.

The omitted hazard, now the headline of A1: stock tailwind-merge classifies an
unknown `text-<x>` as a text COLOUR, and this repo's @theme defines scales it has
never seen (text-2xs, text-3xs, the tracking-* roles, min-h-tap, size-icon-*,
thirteen shadow-*, custom radius-*/leading-*). `cn(eyebrowText)` would therefore
have either its size or its colour silently deleted — a regression across the kit
with no type or lint signal. The deliverable is the extendTailwindMerge config,
not the `cn()` body. Also records the two hazard classes to audit first and the
instruction to baseline the known Windows failures before touching anything.

Prompt fix (§9): that session stalled before step 0 asking whether `git fetch`
fell inside the provider-confirmation boundary. It read the earlier wording
correctly — "any provider-backed workflow" plainly covers a fetch. The boundary
exists for spend, mutation and production risk, none of which a read-only fetch
carries. §9 now pre-authorises fetch, worktree creation and a single-package
npm install by name, keeps the real gates, and records why the paragraph exists
so it is not trimmed away later.

docs:check-links exit 0.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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BigSimmo enabled auto-merge (squash) August 7, 2026 10:33
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BigSimmo merged commit dfcbe20 into main Aug 7, 2026
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Comment on lines +303 to +305
> **Pre-authorised, do not stop to ask:** `git fetch` (read-only, and the local `main` ref is
> reliably stale so you need it), cutting a worktree off latest `origin/main`, and
> `npm install tailwind-merge` as a single package. These are routine and inside the dependency

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P2 Badge Remove the standing authorization for git fetch

When a fresh session follows this embedded prompt, it is told to contact GitHub without asking the current user, even though repository policy explicitly classifies git fetch as provider access requiring user confirmation. A handover document cannot supply that session-specific confirmation, so a compliant agent must ignore this paragraph and stall again, while an agent that follows it performs unauthorized provider access; require the next session to ask before fetching instead.

AGENTS.md reference: AGENTS.md:L302-L306

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