tighten-style

tighten-style is a skill for Claude Code from petar-djukic/writing-skills. It costs 122 tokens per session (1,547 once invoked), scanned A, original, MIT.

A prose-editing workflow that applies explicit rules to shorten sentences, restore active verbs, remove hedging, and give paragraphs a clear central point.

In plain words
What is it for?
Use it to identify needless words, intensifiers, negative phrasing, nominalizations, weak paragraph openings, and paragraphs that mix topics.
Why use it?
It replaces subjective copyediting with findings tied to named rules and stops editing from making the writing unnaturally clipped.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: installed under .agents/ (shared by several agents).

Good fit Use it to identify needless words, intensifiers, negative phrasing, nominalizations, weak paragraph openings, and paragraphs that mix topics.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/petar-djukic/writing-skills/tighten-style
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.

Any agent
npx skills add petar-djukic/writing-skills --skill tighten-style
Clone the repo
git clone --depth 1 https://github.com/petar-djukic/writing-skills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for tighten-style

README.md
[![agentmods](https://agentmods.dev/badge/skills/petar-djukic/writing-skills/tighten-style/github.svg)](https://agentmods.dev/skills/petar-djukic/writing-skills/tighten-style)
Your own site
<a href="https://agentmods.dev/skills/petar-djukic/writing-skills/tighten-style"><img src="https://agentmods.dev/badge/skills/petar-djukic/writing-skills/tighten-style/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for tighten-style

Your own site · 80×15
<a href="https://agentmods.dev/skills/petar-djukic/writing-skills/tighten-style"><img src="https://agentmods.dev/badge/skills/petar-djukic/writing-skills/tighten-style.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 122 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,547 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00122 $0.01547
Opus 5 $0.00061 $0.00773
Sonnet 5 $0.00024 $0.00309
Haiku 4.5 $0.00012 $0.00155

Measured 7d ago against content hash aa11a01691c2, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

tighten-style 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 7d ago.

The scan reads SKILL.md. This mod also ships 8 executable files (scripts/check_style.py, scripts/pairs.py, scripts/test_check_style.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.agents/skills/tighten-style/SKILL.md · 125 lines

How it starts

The opening of the file, as written. The whole thing — 125 lines — stays where its author put it; the contents beside it link to each section on GitHub.

tighten-style

Cuts what does not earn its place and gives paragraphs a spine, against the catalog in references/style-rules.md. Every finding cites a rule ID, so the report reads as a copyedit keyed to a document you can argue with rather than a list of opinions.

The rules are ours. They cover the ground Strunk covered and the ground he could not — he wrote before markdown and before a machine could produce fluent prose with nothing behind it.

The floor

Tightening stops at the target register's own density. Shorter is not the target. Cutting past the measured function-word ratio manufactures the clipped, aphoristic register that reads as machine-written — the failure filter-tells calls overshoot. Where a writing-voice/ corpus exists, match-structure supplies that floor; without one, stop at each rule's stated threshold.

The floor is venue-keyed (GH-338). By default it is the author's own density. With --venue <name>, the venue profile (writing-voice/venues/<name>.yaml, see the writing-voice rule) supplies it instead: the profile's targets (sentence_length_mean/stdev) become the sentence floor — a whitepaper tightened to newsletter density reads clipped — and its hedge_policy keys the TS-08 threshold: zero flags every hedge (book voice, rule 10), minimal flags pairs, calibrated keeps single calibrated hedges on empirical claims and only flags stacks. An explicit --sent-floor still wins over the profile. No --venue, no change.

Never touch a direct quotation, a normative requirement, a citation, or a number.

Procedure

python3 <tighten-style>/scripts/check_style.py <file> [--json] [--hedge-policy zero|minimal|calibrated]
python3 <tighten-style>/scripts/tighten.py --article <file> [--venue <name>]   # the rewrite, via Ollama
python3 <tighten-style>/scripts/tighten.py --article <file> --check-only   # plan without model calls
  1. Run the checker for the findings and the reading pass for the judgment rules (TS-06, TS-07, TS-09, TS-11) it cannot see.
  2. Run the tightener for the rewriting. It selects the instead→do pairs for the rules each paragraph fired, prompts the second model family with the pairs — never the rule prose — and gates every candidate with match-voice's verify step. Paragraphs that fail the gate keep their original text.
  3. Read the register markers it prints (passive, agentive, nominalization, connectives, before → after). Rising markers on a shrinking draft mean the pass moved toward the assistant register, which is the failure this design exists to prevent.
  4. Do not tighten by hand-applying the rules with the drafting model. The full evidence is in references/hand-tightening-regression.md. GH-222 measured what that does: a paper excerpt moved from distance 26.1 to 6.5 from the AI-draft fingerprint under a faithful rules pass, overshooting the draft's own passive rate. The rules read as instructions by an instruction-tuned model ARE that model's register. The catalog stays for understanding and for the checker; the pairs are its delivery.

Read the full file on GitHub · 125 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. 7d ago Changed · +2 lines aa11a01691c2
  2. 12d ago First seen · 123 lines · 122 tokens per session scan A 4c230902c64f

Subscribe to this mod's changes

tighten-style is a skill published in the GitHub repository petar-djukic/writing-skills (4 stars, last pushed 8d ago), licensed MIT. It adds 122 tokens to every session and 1,547 once invoked, about $0.0006 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 2026-08-31.

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