Agent skill

Delta Briefing

by mohitagw15856 in mohitagw15856/pm-claude-skills

Make a recurring brief report what changed since the last edition instead of restating everything.

MITAuto-check passed

Install Delta Briefing

skills CLI
$ npx skills add mohitagw15856/pm-claude-skills --skill delta-briefing -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install mohitagw15856/pm-claude-skills delta-briefing --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/mohitagw15856/pm-claude-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/delta-briefing .claude/skills/delta-briefing && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
delta-briefing
GitHub stars
1.4k
Token cost
~1k tokens
SKILL.md length
542 words
Files
1
Skills in repo
1,348
Repo updated
First seen
Licence
MIT

At a glance

Make a recurring brief report what changed since the last edition instead of restating everything.

  • Works in 5 steps: Load last state. Parse the previous… → Re-observe. Gather this cycle's facts… → Diff into four buckets → …
  • Monthly report keeps repeating itself
  • SKILL.md covers What This Skill Produces, Required Inputs, Delta Method and Output Format, plus 3 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Delta Briefing is an agent skill from mohitagw15856/pm-claude-skills. Make a recurring brief report what changed since the last edition instead of restating everything. Use when a weekly or monthly report keeps repeating itself, when setting up a scheduled monitor or digest, or when asked to make a recurring update delta-aware. Produces a changes-first brief plus the state record the next run will diff against.

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: 1255 professional Agent Skills for Claude, ChatGPT, Gemini, Cursor & Codex — PRDs, postmortems, leases, medical bills, layoffs, go-bags, new countries. Plain markdown, MIT, in… The licence is MIT.

When your agent uses it

  • Monthly report keeps repeating itself
  • Setting up a scheduled monitor
  • Asked to make a recurring update delta-aware

Example prompts

  • “/delta-briefing”

Workflow steps

5 steps, taken from the first numbered list in SKILL.md.

  1. Load last state. Parse the previous state record (or previous edition if that's all there is). List the items it tracked and their status.
  2. Re-observe. Gather this cycle's facts from the sources — independently of the old state, so removals are caught too.
  3. Diff into four buckets
  4. Judge materiality. A delta makes the brief only if the audience would act differently knowing it. Trivia goes to the state record, not the…
  5. Write state for next time. Every tracked item, its current status, the date, and the sources read.

What it can do on your machine

Read from SKILL.md and the folder at commit 1cbf1f0. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are json).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Delta Briefing loads about 1k tokens when it runs. Until then it costs about 90 tokens; SKILL.md has 542 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~90
When it runs · the whole SKILL.md, loaded when a task matches
~1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from mohitagw15856/pm-claude-skills at commit 1cbf1f0, republished under its MIT licence (© mohitagw15856). 542 words, ~1,048 tokens.

Download SKILL.mdSave it as .claude/skills/delta-briefing/SKILL.md (or your agent's skills folder).
name
delta-briefing
description
Make a recurring brief report what changed since the last edition instead of restating everything. Use when a weekly or monthly report keeps repeating itself, when setting up a scheduled monitor or digest, or when asked to make a recurring update delta-aware. Produces a changes-first brief plus the state record the next run will diff against.

Delta Briefing Skill

The failure mode of every recurring report is that edition 6 reads like edition 5. This skill structures a recurring brief around the delta: read the last edition's state, diff the world against it, lead with what changed, and save state for the next run.

What This Skill Produces

  • A changes-first brief: new / changed / resolved / unchanged-but-watched
  • A state record (compact, machine-readable) that the next edition diffs against
  • An explicit "nothing changed" edition format — short, honest, and still useful

Required Inputs

Ask for (if not already provided):

  • The brief's subject and audience (competitive landscape, product metrics, account health…)
  • The previous edition or state record — if none exists, this run is the baseline: say so in the output and produce the first state record
  • Current sources for this cycle
  • Where state lives between runs (a file next to the brief, a Brain folder — see BRAIN.md if using this library's memory)

Delta Method

  1. Load last state. Parse the previous state record (or previous edition if that's all there is). List the items it tracked and their status.
  2. Re-observe. Gather this cycle's facts from the sources — independently of the old state, so removals are caught too.
  3. Diff into four buckets:
    • New — present now, absent last time
    • Changed — tracked before, materially different now (state what moved, old → new)
    • Resolved / gone — tracked before, no longer present or no longer a concern
    • Watching — unchanged but still worth tracking (compressed to one line each)
  4. Judge materiality. A delta makes the brief only if the audience would act differently knowing it. Trivia goes to the state record, not the brief.
  5. Write state for next time. Every tracked item, its current status, the date, and the sources read.

Output Format

Show full SKILL.md (254 more words)Show less
[Brief name] — [date] (edition [n], previous: [date])

TL;DR: [1-2 sentences: the most consequential delta, or "no material changes"]

New since last edition

  • [item] — [why it matters, one line]

Changed

  • [item]: [old] → [new] — [implication]

Resolved

  • [item] — [how it closed]

Still watching (one line each)

  • [item] — [status]
<details>
<summary>State record (for the next run)</summary>
json
{ "edition": n, "date": "YYYY-MM-DD", "sources": ["..."],
  "items": [ { "id": "...", "status": "...", "note": "..." } ] }
</details>

If nothing material changed: say exactly that in three lines — TL;DR ("no material changes"), what was checked, next edition date. Do not pad.

Quality Checks

  • The brief opens with the delta, not with background the audience read last time
  • Every "Changed" item shows both the old and the new value
  • Removals were checked by re-observing, not just re-confirming last edition's list
  • A state record exists at the end, complete enough that the next run needs no other memory
  • The baseline edition (no previous state) is labelled as a baseline, not presented as a delta

Anti-Patterns

  • Do not restate unchanged items at full length — one line in "Still watching" or nothing
  • Do not fabricate a delta to make a quiet cycle look productive — "nothing changed" is a valid, valuable edition
  • Do not diff against memory or vibes — only against the stored state record
  • Do not let the state record and the brief disagree — the record is written from the brief's facts
  • Do not track everything forever — items resolved two editions ago leave the state record

Example Trigger Phrases

  • "Our weekly report keeps repeating itself."
  • "Only tell me what changed since last week."
  • "Set up a scheduled monitor."
  • "Make this recurring update delta-aware."

© mohitagw15856, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/delta-briefing of mohitagw15856/pm-claude-skills.

Open the folder on GitHubat commit 1cbf1f0

Compare with similar skills

Delta Briefing next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Delta Briefing compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Delta Briefing this skillmohitagw15856/pm-claude-skills1.4k—~1kAutomated safety check: PassMIT
Briefalirezarezvani/claude-skills28k—~967Automated safety check: PassMIT
Review Deltatirth8205/code-review-graph32k—~325Automated safety check: PassMIT
Coauthor Briefpedrohcgs/claude-code-my-workflow1.7k—~2.9kAutomated safety check: NotesMIT
Briefdavepoon/buildwithclaude3.6k—~1.3kAutomated safety check: NotesMIT
Make Changesremix-run/remix33k—~2.4kAutomated safety check: PassMIT

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Questions about Delta Briefing

What does Delta Briefing do?

Make a recurring brief report what changed since the last edition instead of restating everything. Delta Briefing is an agent skill from mohitagw15856/pm-claude-skills. Make a recurring brief report what changed since the last edition instead of restating everything.

When should I use Delta Briefing?

Delta Briefing fits situations like: monthly report keeps repeating itself; setting up a scheduled monitor; asked to make a recurring update delta-aware.

How do I install Delta Briefing in Claude Code?

Run `npx skills add mohitagw15856/pm-claude-skills --skill delta-briefing -a claude-code`. Or copy the skill folder (skills/delta-briefing in mohitagw15856/pm-claude-skills) into .claude/skills/delta-briefing in your project. Claude Code loads it when a task matches its description.

How do I install Delta Briefing in Codex?

Run `npx skills add mohitagw15856/pm-claude-skills --skill delta-briefing -a codex`. Or copy the skill folder (skills/delta-briefing in mohitagw15856/pm-claude-skills) into .agents/skills/delta-briefing in your project. Codex loads it when a task matches its description.

Can I use Delta Briefing in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add mohitagw15856/pm-claude-skills --skill delta-briefing -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/delta-briefing, .gemini/skills/delta-briefing, .github/skills/delta-briefing and .opencode/skills/delta-briefing in your project.

What does Delta Briefing need to run?

SKILL.md names no scripts, command-line tools or credentials: Delta Briefing is instructions for the agent only.

Does Delta Briefing access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Delta Briefing safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Delta Briefing use?

Delta Briefing is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Delta Briefing use?

About 1k tokens (SKILL.md is roughly 4.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Delta Briefing?

Skills that share tags, products or a category with Delta Briefing: Brief (alirezarezvani/claude-skills, 28k stars), Review Delta (tirth8205/code-review-graph, 32k stars), Coauthor Brief (pedrohcgs/claude-code-my-workflow, 1.7k stars) and Brief (davepoon/buildwithclaude, 3.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Delta Briefing?

mohitagw15856 (a GitHub user) maintains it in mohitagw15856/pm-claude-skills, which has 1,434 GitHub stars. The repository holds 1,348 skills in this directory. The repository was last updated on October 9, 2026.

Source: mohitagw15856/pm-claude-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.