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docs: Distinguish handwritten look-alikes - #134

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codex/108-lookalike-writing-guide

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What

Add the recovery-card handwriting legend requested in #108: stroke S, slash 0, cross Z and 7, and give 5 a flat top. The user guide points operators to the same convention and notes that O, I, and B are not codex32 characters.

Why

A field tester confused 5/S and O/0 while copying recovery material. Confirmation caught the error, but the printed card should prevent the ambiguity before recovery is needed.

Review shape

One documentation-only commit, two added lines, no runtime code changes.

Verification

Compared directly with current reviewability-v1: one commit ahead, two files changed, one added line in each file.

Fixes #108.

AI assistance prepared this focused documentation patch; responsible-human review and integration remain required.

Add the drafting conventions already used by the codex32 recovery material to the printable card and user guide so operators can distinguish the characters most likely to be confused during transcription.

Fixes #108
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chatgpt-codex-connector Bot commented Oct 7, 2026 •

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Review Status Commit Review trigger
📝 Code Review ✅ Completed 2026-10-07T04:38:59.918771Z 5453c63 Manual request
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💡 Codex Review

Here are some automated review suggestions for this pull request.

Reviewed commit: 5453c63229

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<span class="group"></span><span class="group"></span><span class="group"></span><span class="group"></span>
</div>
<p class="small">Leave unused boxes blank.</p>
<p class="small"><strong>Handwriting legend:</strong> draw S with a vertical stroke ($), slash 0, cross Z and 7, and give 5 a flat top. O, I, and B are not codex32 characters; a written O can only mean 0.</p>

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P2 Badge Limit the excluded-letter claim to the data part

For generic codex32 artifacts, O, I, and B may legally appear in the application prefix before the 1 separator: bech32_decode() accepts any printable single-case ASCII HRP and applies the restricted charset only after the separator. An operator following “a written O can only mean 0” could therefore corrupt a valid opaque-HRP backup during transcription. Clarify that these letters are excluded only from the encoded data portion, or explicitly exempt the application prefix.

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Comment thread docs/user/guide.md

Before running `create` for a real wallet, have your blank cards, a pen, and
wallet record ready, and choose separate trusted places for shared cards.
When handwriting recovery text, follow the card legend: stroke S, slash 0, cross Z and 7, and give 5 a flat top; O, I, and B are not codex32 characters.

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P2 Badge Wrap the new documentation lines

This added guide line is 152 characters, and the parallel recovery-card legend is 210 characters, so both exceed the repository's 110-character limit and depart from the wrapped style used by the surrounding documentation. Wrap both additions into shorter source lines without changing their rendered prose.

AGENTS.md reference: AGENTS.md:L54-L59

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AI-assisted current-head docs review: ACK 5453c63. The guide and blank recovery card give the same practical handwriting key. No code or recovery-behavior changes.

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