hypothesis-deep-verification

hypothesis-deep-verification is a skill for Claude Code, Codex from panjose/Co-Scientist. It costs 19 tokens per session (1,190 once invoked), scanned A, original, Apache-2.0.

A research review skill that breaks a hypothesis into assumptions and checks those assumptions against available evidence.

In plain words
What is it for?
Use it to deeply verify a hypothesis, create review results, and produce evidence-search artifacts for unresolved claims.
Why use it?
It helps reveal unsupported links in an argument and identifies when more literature evidence is needed.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents; mentions Codex.

Good fit Use it to deeply verify a hypothesis, create review results, and produce evidence-search artifacts for unresolved claims.

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Install with agentmods
npx agentmods add skills/panjose/co-scientist/hypothesis-deep-verification
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 panjose/Co-Scientist --skill hypothesis-deep-verification
Clone the repo
git clone --depth 1 https://github.com/panjose/Co-Scientist

Made for: Claude Code, Codex.

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.

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README.md
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Your own site
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Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,190 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 $0.00019 $0.01190
Opus 5 $0.00010 $0.00595
Sonnet 5 $0.00004 $0.00238
Haiku 4.5 $0.00002 $0.00119

Measured 9d ago against content hash 9fa05ca4a61e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

hypothesis-deep-verification 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.

skills/hypothesis-deep-verification/SKILL.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

hypothesis-deep-verification

Goal:

  • Run the assumption decomposition and deep verification review for a hypothesis.

Inputs:

  • research_plan/RESEARCH_PLAN.json
  • hypotheses/<id>/HYPOTHESIS.json
  • literature/queries/<query_id>/EVIDENCE_BUNDLE.json as an EvidenceBundleContract when external evidence is needed to judge a core assumption
  • optional prior review artifacts for calibration

Outputs:

  • hypotheses/<id>/REVIEW/DEEP_VERIFICATION.json
  • literature/queries/<query_id>/* search bridge artifacts when a new evidence query is required

Context Loading:

  • Open skills/shared-references/schema-index.md.
  • Open skills/shared-references/literature-search-contract.md.
  • Open skills/shared-references/codex-reviewer-routing.md before using any optional Codex reviewer subagent route.
  • Read packages/agent_contracts/literature.py before building or consuming search bridge artifacts.
  • Read research_plan/RESEARCH_PLAN.json for the active goal and boundaries.
  • Read hypotheses/<id>/HYPOTHESIS.json.
  • If previous review artifacts exist, use them to focus decomposition on already-suspect links, but still perform an independent structural check.

Execution Prompt Contract:

  • System Intent:
    • You are the structural verification layer for one hypothesis.
  • Required Reasoning Focus:
    • Decompose the hypothesis into core assumptions.
    • Break each assumption into independently judgeable sub-assumptions where useful.
    • For assumptions that depend on external literature support, call tools.search_literature(run_dir, request) or consume an existing matching evidence bundle before marking the link as supported.
    • If Codex reviewer subagents are available and explicitly useful for structural verification, they may inspect the same canonical artifacts, but the main thread must still validate and persist the canonical DEEP_VERIFICATION.json.
    • If subagents are unavailable, execute the same verification contract in the main thread and record reviewerRoute = local_main_thread when a reviewer route trace is written.
    • Read retrieval_metadata.status before marking any evidence-dependent assumption as externally supported.
    • Mark which links appear well-supported by the evidence bundle, speculative but plausible, unsupported because retrieval was blocked, or likely incorrect.
    • If retrieval_metadata.status is partial, mark externally supported links as limited by partial retrieval rather than fully literature-confirmed.
    • Surface flaws in reasoning chains, hidden assumptions, or logically weak transitions.
  • Do Not Do:
    • Do not collapse the whole hypothesis into one coarse verdict.
    • Do not invent additional research goals or evaluation criteria.
    • Do not produce deep verification as unstructured prose.
    • Do not invent papers, DOIs, arXiv IDs, venues, citation counts, abstracts, or literature claims not present in the evidence bundle.
    • Do not use model memory as a substitute for search bridge artifacts.
    • Do not let a reviewer subagent write deterministic mechanics artifacts or bypass schema validation.
  • Review Quality Floor:
    • A status = completed deep verification review must include at least one concrete assumption with a non-empty correctness rationale.
    • Assumptions must decompose the hypothesis mechanism or validation path; do not write generic entries such as mechanism is plausible or needs validation.
    • Do not use placeholder verification phrases such as Viable evolved hypothesis, Refined from parent, or validated by future experiments as substantive review content.
    • If an assumption depends on literature evidence, preserve the linked evidence limitation or retrieval status rather than inventing support.
  • Output Shape:
    • Produce the exact DeepVerificationReviewContract from packages/agent_contracts/review.py.
    • Keep statements and correctness rationales concise.

Execution Steps:

  1. Open skills/shared-references/schema-index.md, skills/shared-references/literature-search-contract.md, and skills/shared-references/codex-reviewer-routing.md, then read packages/agent_contracts/review.py and packages/agent_contracts/literature.py before writing DEEP_VERIFICATION.json, reviewer traces, or consuming search bridge artifacts.
  2. Read the research plan and hypothesis.
  3. Extract the core assumptions behind the mechanism or validation path.
  4. For assumptions whose correctness depends on external literature, build a focused SearchRequestContract and call tools.search_literature(run_dir, request) unless a matching evidence bundle already exists.
  5. If retrieval is blocked, preserve that uncertainty in the affected assumption correctness rationales instead of claiming external support.
  6. If retrieval is partial, preserve that limitation in the affected assumption correctness rationales instead of claiming comprehensive external support.
  7. Decompose assumptions where necessary.
  8. Evaluate each assumption or sub-assumption.
  9. Write hypotheses/<id>/REVIEW/DEEP_VERIFICATION.json.
  10. Validate before declaring completion.

Read the full file on GitHub · 87 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. 9d ago First seen · 87 lines · 19 tokens per session scan A 9fa05ca4a61e

Subscribe to this mod's changes

hypothesis-deep-verification is a skill published in the GitHub repository panjose/Co-Scientist (5 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 19 tokens to every session and 1,190 once invoked, about $0.0001 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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