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 jeffreytse/grimoire-core --skill apply-competitive-encirclementgit clone --depth 1 https://github.com/jeffreytse/grimoire-coreWrote 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/jeffreytse/grimoire-core/apply-competitive-encirclement)<a href="https://agentmods.dev/skills/jeffreytse/grimoire-core/apply-competitive-encirclement"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/apply-competitive-encirclement/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.
<a href="https://agentmods.dev/skills/jeffreytse/grimoire-core/apply-competitive-encirclement"><img src="https://agentmods.dev/badge/skills/jeffreytse/grimoire-core/apply-competitive-encirclement.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00049 | $0.02289 |
| Opus 5.5 | $0.00020 | $0.00916 |
| Sonnet 5.5 | $0.00010 | $0.00458 |
| Haiku 4.5 | $0.00005 | $0.00229 |
Grade A, and why
apply-competitive-encirclement 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 1mo 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 — 109 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Apply Competitive Encirclement
Map the opponent's available countermoves, systematically close them off before revealing your intent, then execute the main move against an opponent with no recourse.
Why This Is Best Practice
Origin: Stratagem #22 of the Thirty-Six Stratagems: "Shut the door to catch the thief" (關門捉賊). The image: do not chase a thief through the streets — seal the building first, so there is nowhere to flee, then confront them on your terms. Applied to strategy: before revealing a competitive move, close all the opponent's escape routes. When the move lands, the opponent cannot pivot to an alternative distribution channel, cannot recruit the talent they need to respond, cannot obtain the supply they need to compete, cannot challenge your regulatory position.
Adopted by: Competitive encirclement underlies the most decisive pre-emptive competitive moves in technology and consumer markets. Microsoft's OEM licensing strategy — securing per-CPU licensing fees from PC manufacturers before the IBM PC clone market was established — closed the distribution channel against all competing desktop operating systems before competitors recognised the channel as contested ground. Apple's exclusive carrier deal with AT&T for the original iPhone closed the primary US mobile distribution channel before competing smartphones existed. Intel's reservation of semiconductor fab capacity in advance of a product cycle forecloses competitive supply options for the product launch window. Porter's "mobility barriers" — industry conditions that prevent competitors from repositioning — describe the structural outcome of encirclement executed successfully.
Impact: Competitors who cannot access distribution, talent, supply, or regulatory standing cannot compete effectively regardless of product quality. The encirclement converts the competitive battle from a test of product merit into a test of preparation — and the competitor who prepared before the battle is known to have begun wins.
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.
- 1mo ago First seen · 109 lines · 49 tokens per session scan A dc76ddcb146f
apply-competitive-encirclement is a skill published in the GitHub repository jeffreytse/grimoire-core (5 stars, last pushed 5d ago), licensed MIT. It adds 49 tokens to every session and 2,289 once invoked, about $0.0002 per session on Opus 5.5. 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 2026-09-03.
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