diffity-resolve

A code-review helper that reads open comments attached to changed files and applies fixes to resolve them.

In plain words
What is it for?
Use it to list review comments, fix the referenced files and lines, reply to discussions, and mark comments resolved or dismissed.
Why use it?
It keeps review feedback connected to the relevant code and helps turn requested changes into completed fixes.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/nilbuild/diffity/diffity-resolve
Any agent
npx skills add nilbuild/diffity --skill diffity-resolve
Clone the repo
git clone --depth 1 https://github.com/nilbuild/diffity

Made for: Claude Code, Codex.

Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 961 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00016 $0.00961
Opus 5 $0.00008 $0.00481
Sonnet 5 $0.00003 $0.00192
Haiku 4.5 $0.00002 $0.00096

Measured 2d ago against content hash a76f6a15fcd8, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

diffity-resolve scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

packages/skills/diffity-resolve/SKILL.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Diffity Resolve Skill

You are reading open review comments and resolving them by making the requested code changes.

Arguments

  • thread-id (optional): Resolve a specific thread by ID instead of all open threads. Example: /diffity-resolve abc123

CLI Reference

{{binary}} agent diff
{{binary}} agent list [--status open|resolved|dismissed] [--json]
{{binary}} agent comment --file <path> --line <n> [--end-line <n>] [--side new|old] --body "<text>"
{{binary}} agent general-comment --body "<text>"
{{binary}} agent resolve <id> [--summary "<text>"]
{{binary}} agent dismiss <id> [--reason "<text>"]
{{binary}} agent reply <id> --body "<text>"
  • --file, --line, --body are required for comment
  • --end-line defaults to --line (single-line comment)
  • --side defaults to new
  • general-comment creates a diff-level comment not tied to any file or line
  • <id> accepts full UUID or 8-char prefix

Prerequisites

  1. Check that {{binary}} is available: run which {{binary}}. If not found, {{install_hint}}.
  2. Check that a review session exists: run {{binary}} agent list. If this fails with "No active review session", tell the user to start diffity first (e.g. {{binary}} or {{slash}}diff).

Instructions

  1. List open comment threads with full details:
    {{binary}} agent list --status open --json
    
    If a thread-id argument was provided, filter to just that thread. The JSON output includes the full comment body, file path, line numbers, and side for each thread.
  2. If there are no open threads, tell the user there's nothing to resolve.
  3. For each open thread, check the comments array and the author.type field ("user" or "agent") on each comment: a. Skip general comments (filePath __general__) — these are summaries, not actionable code changes. b. Skip threads where the last comment is an agent reply that asks the user a question (e.g. "Could you clarify...?") and the user hasn't responded yet — the agent is waiting for user input. Still process threads where the agent left the original comment (code suggestion, review feedback, etc.) — those are actionable. c. [nit] comments — these are minor suggestions but still actionable. Resolve them like any other comment. d. [question] comments (from the user) — read the question, examine the relevant code, and resolve the thread with your answer as the summary:
    {{binary}} agent resolve <thread-id> --summary "Your answer here"
    
    e. Comments phrased as questions without an explicit [question] tag (e.g. "should we add X?" or "can we rename this?") are suggestions — treat them as actionable requests and make the change. f. Read the comment body from the JSON output and understand what change is requested. Interpret the intent:
    • If the comment suggests a code change, make the change.
    • If the comment suggests adding documentation, add or update the relevant docs.
    • If the comment asks a question that implies an action (e.g. "should we add X?"), treat it as a request to do that action.
    • If the comment is genuinely unclear and you cannot determine what action to take, reply asking for clarification instead of silently skipping:
      {{binary}} agent reply <thread-id> --body "Could you clarify what change you'd like here?"
      
    g. Read the relevant source file to understand the full context around the commented lines, then make the requested change using the Edit tool. h. After making the change, resolve the thread with a summary:
    {{binary}} agent resolve <thread-id> --summary "Fixed: <brief description of what was changed>"
    
  4. After resolving all applicable threads, run {{binary}} agent list to confirm status.
  5. Tell the user to check the browser — resolved status will appear within 2 seconds via polling.

Read the full file on GitHub · 70 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 70 lines · 16 tokens per session scan A a76f6a15fcd8

Subscribe to this mod's changes

diffity-resolve is a skill published in the GitHub repository nilbuild/diffity (762 stars, last pushed 1mo ago), licensed MIT. It adds 16 tokens to every session and 961 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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