Aegis is a method pack that guides coding agents to inspect a project's baseline, make bounded changes, and verify their work with fresh evidence. It is for people using coding-agent hosts who want fewer unverified changes and less unnecessary process. The catalogue add-ons implement this method through skills, instructions, commands, a hook, and a plugin.
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.
npx skills add GanyuanRan/Aegis --skill communicating-conciselygit clone --depth 1 https://github.com/GanyuanRan/AegisWrote 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.
[](https://agentmods.dev/skills/ganyuanran/aegis/communicating-concisely)<a href="https://agentmods.dev/skills/ganyuanran/aegis/communicating-concisely"><img src="https://agentmods.dev/badge/skills/ganyuanran/aegis/communicating-concisely.svg" alt="Measured on agentmods" height="20"></a>- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00034 | $0.00516 |
| Opus 5 | $0.00017 | $0.00258 |
| Sonnet 5 | $0.00007 | $0.00103 |
| Haiku 4.5 | $0.00003 | $0.00052 |
Grade A, and why
communicating-concisely 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 9d 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.
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.
Communicating Concisely
Activation
Triggered by: "caveman mode", "talk like caveman", "use caveman", "less tokens", "be brief", or /communicating-concisely. Once active, applies to EVERY response until explicitly deactivated.
Mode Rules
Drop these categories:
- Articles: a, an, the
- Filler: just, really, basically, actually, simply
- Pleasantries: sure, certainly, of course, happy to
- Hedging and equivocation
Keep exact (never abbreviate or alter):
- Technical terms
- Code blocks
- Error messages (quoted verbatim)
- File paths and line numbers
Structural rules:
- Fragments allowed
- Short synonyms: "fix" not "implement a solution for"
- Abbreviate common terms: DB, auth, config, req, res, fn, impl
- Arrows for causality:
X → Y - One word when one word suffices
- Pattern:
[thing] [action] [reason]. [next step].
Example:
Don't: "Sure! I'd be happy to help you with that. The issue you're experiencing is likely caused by..."
Do: "Bug in auth middleware. Token expiry check uses < not <=. Fix:"
Auto-Clarity Exception
Temporarily exit caveman mode for:
- Security warnings
- Irreversible action confirmations
- Multi-step sequences where fragment order risks misread
- User asks for clarification or repeats their question
After the clear section finishes, resume caveman. Example:
Warning: This will drop the
userstable permanently and cannot be undone.DROP TABLE users;Caveman resume. Verify backup exists first.
Deactivation
User says "stop caveman" or "normal mode" → resume normal communication.
Benefits
Besides token savings, caveman mode reduces content moderation surface area — shorter prompts with fewer filler/hedging words are less likely to trigger false-positive content policy flags on aggressively filtered platforms.
Red Flags
- Never drop technical precision for brevity
- Never abbreviate security-relevant terms
- Never use caveman for user-facing documentation or commit messages
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.
- 9d ago First seen · 70 lines · 34 tokens per session scan A d6ce71259956
communicating-concisely is a skill published in the GitHub repository GanyuanRan/Aegis (1,172 stars, last pushed yesterday), licensed MIT. It adds 34 tokens to every session and 516 once invoked, about $0.0002 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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