verify-bidirectional

verify-bidirectional is a skill for Claude Code from chrono-meta/forge-harness. It costs 62 tokens per session (5,421 once invoked), scanned A, original, MIT.

A review step for AI advice that reacts when you question or challenge a recommendation. It records the revised starting point for the next session.

In plain words
What is it for?
Use it when you ask whether an answer is correct, point out something that seems wrong, or compare it with your own files, past decisions, or independent checks.
Why use it?
It helps prevent an AI from continuing with an assumption that you have shown to be wrong or incomplete.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter; mentions CLAUDE.md.

Part of the fh-meta plugin — 38 skills, 7 agents shipped together

Good fit Use it when you ask whether an answer is correct, point out…

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Install with agentmods
npx agentmods add skills/chrono-meta/forge-harness/verify-bidirectional
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 chrono-meta/forge-harness --skill verify-bidirectional
Clone the repo
git clone --depth 1 https://github.com/chrono-meta/forge-harness

Made for: Claude Code.

Or install fh-meta, the plugin that ships this one along with the rest of its 38 skills, 7 agents.

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 verify-bidirectional

README.md
[![agentmods](https://agentmods.dev/badge/skills/chrono-meta/forge-harness/verify-bidirectional.svg)](https://agentmods.dev/skills/chrono-meta/forge-harness/verify-bidirectional)
Your own site
<a href="https://agentmods.dev/skills/chrono-meta/forge-harness/verify-bidirectional"><img src="https://agentmods.dev/badge/skills/chrono-meta/forge-harness/verify-bidirectional.svg" alt="Measured on agentmods" height="20"></a>
Per session 62 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,421 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 $0.00062 $0.05421
Opus 5 $0.00031 $0.02710
Sonnet 5 $0.00012 $0.01084
Haiku 4.5 $0.00006 $0.00542

Measured 7d ago against content hash 0ffd3eceb032, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

verify-bidirectional 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.

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.

plugins/fh-meta/skills/verify-bidirectional/SKILL.md · 353 lines

How it starts

The opening of the file, as written. The whole thing — 353 lines — stays where its author put it; the contents beside it link to each section on GitHub.

verify-bidirectional — Bidirectional Self-Validation Automation

Automates the processing procedure for bidirectional self-validation. Three stages: user counter-argument → baseline update → next session reflection.

Trigger Conditions

Immediately after this harness AI recommendation/agreement/decision is committed, when the user raises a refinement challenge:

  1. Proposition refinement: "isn't it more like..." / "I'd say..." / "what about this" / "what's the root?"
  2. Baseline grep trigger: User cross-references own assets, memory, CLAUDE.md rules, past decisions
  3. Meta-level trigger: "if you have objections" / "double-check" / "essence" / "root cause"
  4. Side validation result: User runs independent tools (/skills · gh · external fetch) → catches mismatch with this harness AI hypothesis

Natural Language Triggers (works without internal vocabulary)

Also triggered in external user environments by these natural language phrases:

Phrase Intent
"is that right?", "re-examine this" Request AI recommendation re-validation
"something seems off", "this doesn't feel right" Counter-argument / refinement
"I think you said something different before" Catch inconsistency with past decisions
"can you be more precise?" Proposition refinement trigger
"what's your basis?", "why do you think that?" Baseline grep trigger
"check that one more time" Self-validation request

🟥 5. Prescriptive doctrine statement — the category that fell through (added 2026-08-16)

Every trigger above is shaped as doubt about a claim. A large class of operator correction is not doubt at all — it is a standing rule being handed over, stated as fact or instruction:

Shape Real examples (2026-08-16 session)
"X should also include Y" "입장리뷰에는 정적리뷰뿐만 아니라 동적리뷰도 포함되어야 할 거야"
"the real point of X is Z" (redefining, not doubting) "부스팅보다 인큐베이터의 장점은 그 레포 전체를 감싸서 …모든 것을 조작할 수 있는 권한이 있는 거야"
"isn't this too late / wrong-ordered?" (rhetorical, expects agreement) "이 실패가 CI 확인 단계에서야 발견되는 건 매우 늦은 게 아닐까"
"from now on, do W at Z" "앞으로도 마감할 때 그 갈래로 이어갈 수 있게 알아서 정리해줘"

Read the full file on GitHub · 353 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 First seen · 353 lines · 62 tokens per session scan A 0ffd3eceb032

Subscribe to this mod's changes

verify-bidirectional is a skill published in the GitHub repository chrono-meta/forge-harness (14 stars, last pushed today), licensed MIT. It adds 62 tokens to every session and 5,421 once invoked, about $0.0003 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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