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repro-sdk-prompt-suggest

Repro: marks every prompt suggestion that passes through prompt.suggest

newprompt
v0.1.0no licenseupdated 2026-10-06Vatroslav/cc-mod-suggestion-sentence-case/repro/sdk-prompt-suggest
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README

cc-mod-suggestion-sentence-case

A Claude Code mod. After a turn, Claude Code proposes your next prompt as dim text in the empty prompt box, and Tab accepts it. The suggestion often comes in lowercase and without a full stop, so if you write your prompts as sentences, every accepted suggestion needs fixing before you send it. This mod rewrites the suggestion before it is shown: it starts with a capital letter and ends with a full stop.

SuggestedShown
run the testsRun the tests.
why did it fail?Why did it fail?
čekaj da završiČekaj da završi.
` npm test again `` npm test again. `
/commit/commit

Rules

  • The first character is capitalized only if it is a letter. A suggestion that starts with code, a quote or a digit keeps its start.
  • No full stop is added after ., ?, !, … or :.
  • A slash command stays exactly as it is.
  • Spaces at either end are trimmed.
  • Only the suggestion changes. Nothing you type or send is touched.

How it works

One prompt.suggest hook in plugin/hooks/register.ts rewrites the text and passes it on with next({ ...e, text }). It calls nothing on $: no files, processes, network or model calls.

It handles every suggestion, both Claude Code's own and any that another plugin proposes through $.prompt.suggest.

Limitation: not in Claude Desktop yet

In the Code tab of Claude Desktop the suggestion shows unchanged: there the engine sends it to the host without raising prompt.suggest, so the mod never sees it. The mod starts working there by itself once the engine routes that suggestion through prompt.suggest. The versions measured, a minimal repro and the bug report (anthropics/claude-code#99876) are in docs/claude-desktop.md.

Install

claude plugin marketplace add <path-to-this-repo>
claude plugin install cc-mod-suggestion-sentence-case@cc-mod-suggestion-sentence-case --scope user

On Claude Code builds before 2.1.287, function hooks of installed plugins may need "CLAUDE_CODE_ENABLE_FUNCTION_HOOKS": "1" in the env block of ~/.claude/settings.json.

Check and test: claude plugin validate ./plugin and claude plugin test ./plugin.

Source 1 files
hooks/register.ts 8 lines
1import type { Register } from 'claude-code'
2
3// Marks every suggestion that passes through prompt.suggest. A suggestion without the
4// marker was shown without the hook running.
5export const register: Register = on => {
6  on('prompt.suggest', ($, e, next) => next({ ...e, text: `[prompt.suggest ran] ${e.text}` }))
7}
8