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From cipherpowers
Deploys two independent agents for code reviews, plan audits, research, or verification, then collates findings to highlight common issues, unique insights, and divergences. Use for high-stakes quality assurance.
How this skill is triggered — by the user, by Claude, or both
Slash command
/cipherpowers:dual-verificationThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
Use two independent agents to systematically review content or research a topic, then use a collation agent to compare findings.
Use two independent agents to systematically review content or research a topic, then use a collation agent to compare findings.
Core principle: Independent dual perspective + systematic collation = higher quality, managed context.
Announce at start: "I'm using the dual-verification skill for comprehensive [review/research]."
Use dual-verification when:
For Reviews:
For Research:
Don't use when:
| Phase | Action | Output | User Action |
|---|---|---|---|
| Phase 1 | Dispatch 2 agents in parallel | Two independent reports | Wait |
| Phase 2 | Collate findings, present to user | Collated report | Can /revise common |
| Phase 3 | Cross-check exclusive issues (background) | Validated exclusive issues | Can /revise exclusive or /revise all |
Confidence levels:
Exclusive issue states (after cross-check):
Higher quality through independence:
Context management:
Confidence progression:
/revise common)Parallel workflow:
/revise common while cross-check runs/revise exclusive or /revise allDispatch 2 agents in parallel with identical prompts.
Agent prompt template:
You are [agent type] conducting an independent verification review.
**Context:** You are one of two agents performing parallel independent reviews. Another agent is reviewing the same content independently. A collation agent will later compare both reviews.
**Your task:** Systematically verify [subject] against [ground truth].
**Critical instructions:**
- Current content CANNOT be assumed correct. Verify every claim.
- You MUST follow the review report template structure
- Template location: ${CLAUDE_PLUGIN_ROOT}templates/verify-template.md
- You MUST save your review with timestamp: `.work/{YYYY-MM-DD}-verify-{type}-{HHmmss}.md`
- Time-based naming prevents conflicts when agents run in parallel.
- Work completely independently - the collation agent will find and compare all reviews.
**Process:**
1. Read the review report template to understand the expected structure
2. Read [subject] completely
3. For each [section/component/claim]:
- Identify what is claimed
- Verify against [ground truth]
- Check for [specific criteria]
4. Categorize issues by:
- Category ([issue type 1], [issue type 2], etc.)
- Location (file/section/line)
- Severity ([severity levels])
5. For each issue, provide:
- Current content (what [subject] says)
- Actual [ground truth] (what is true)
- Impact (why this matters)
- Action (specific recommendation)
6. Save using template structure with all required sections
**The template provides:**
- Complete structure for metadata, issues, summary, assessment
- Examples of well-written reviews
- Guidance on severity levels and categorization
Example: Documentation Review
Example: Plan Review
Example: Code Review
Dispatch collation agent to compare the two reviews, then present to user immediately.
Dispatch collation agent:
Use Task tool with:
subagent_type: "cipherpowers:review-collation-agent"
description: "Collate dual [review type] reviews"
prompt: "You are collating two independent [review type] reviews.
**Critical instructions:**
- You MUST follow the collation report template structure
- Template location: ${CLAUDE_PLUGIN_ROOT}templates/verify-collation-template.md
- Read the template BEFORE starting collation
- Save to: `.work/{YYYY-MM-DD}-verify-{type}-collated-{HHmmss}.md`
**Inputs:**
- Review #1: [path to first review file]
- Review #2: [path to second review file]
**Your task:**
1. **Read the collation template** to understand the required structure
2. **Parse both reviews completely:**
- Extract all issues from Review #1
- Extract all issues from Review #2
- Create internal comparison matrix
3. **Identify common issues** (both found):
- Same issue found by both reviewers
- Confidence: VERY HIGH
4. **Identify exclusive issues** (only one found):
- Issues found only by Agent #1
- Issues found only by Agent #2
- Confidence: MODERATE (pending cross-check)
5. **Identify divergences** (agents disagree):
- Same location, different conclusions
- Contradictory findings
6. **IF divergences exist → Verify with appropriate agent:**
- Dispatch verification agent for each divergence
- Provide both perspectives and specific divergence point
- Incorporate verification analysis into report
7. **Follow template structure for output:**
- Metadata section (complete all fields)
- Executive summary (totals and breakdown)
- Common issues (VERY HIGH confidence)
- Exclusive issues (MODERATE confidence - pending cross-check)
- Divergences (with verification analysis)
- Recommendations (categorized by action type)
- Overall assessment
**The template provides:**
- Complete structure with all required sections
- Examples of well-written collation reports
- Guidance on confidence levels and categorization
- Usage notes for proper assessment
Present collated report to user immediately:
Collation complete. Report saved to: [path]
**Summary:**
- Common issues: X (VERY HIGH confidence) → Can `/revise common` now
- Exclusive issues: X (MODERATE - cross-check starting)
- Divergences: X (resolved/unresolved)
**Status:** Cross-check running in background...
User can now /revise common while cross-check runs.
Dispatch cross-check agent to validate exclusive issues against the codebase/implementation.
This phase runs in the background after presenting collation to user.
Purpose: Exclusive issues have MODERATE confidence because only one reviewer found them. Cross-check validates whether the issue actually exists by checking against ground truth.
Dispatch cross-check agent:
Use Task tool with:
subagent_type: "[appropriate agent for review type]"
description: "Cross-check exclusive issues"
prompt: "You are cross-checking exclusive issues from a dual-verification review.
**Context:**
Two independent reviewers performed a [review type] review. The collation identified
issues found by only one reviewer (exclusive issues). Your task is to validate
whether each exclusive issue actually exists.
**Collation report:** [path to collation file]
**Your task:**
For EACH exclusive issue in the collation report:
1. **Read the issue description** from the collation report
2. **Verify against ground truth:**
- For doc reviews: Check if the claim is accurate against codebase
- For code reviews: Check if the issue exists in the implementation
- For plan reviews: Check if the concern is valid against requirements
3. **Assign validation status:**
- VALIDATED: Issue confirmed to exist → should be addressed
- INVALIDATED: Issue does not apply → can be skipped
- UNCERTAIN: Cannot determine → escalate to user
**Output format:**
For each exclusive issue, provide:
- Issue: [from collation]
- Source: Reviewer #[1/2]
- Validation: [VALIDATED/INVALIDATED/UNCERTAIN]
- Evidence: [what you found that supports your conclusion]
- Recommendation: [action to take]
**Save to:** `.work/{YYYY-MM-DD}-verify-{type}-crosscheck-{HHmmss}.md`
Agent selection for cross-check:
| Review Type | Cross-check Agent |
|---|---|
| docs | cipherpowers:code-agent (verify against implementation) |
| code | cipherpowers:code-agent (verify against codebase) |
| plan | cipherpowers:plan-review-agent (verify against requirements) |
| execute | cipherpowers:execute-review-agent (verify against plan) |
When cross-check completes:
Cross-check complete. Report saved to: [path]
**Exclusive Issues Status:**
- VALIDATED: X issues (confirmed, should address)
- INVALIDATED: X issues (can skip)
- UNCERTAIN: X issues (user decides)
**Ready for:** `/cipherpowers:revise exclusive` or `/cipherpowers:revise all`
Update collation report with cross-check results:
Make the pattern flexible by specifying:
Subject: What to review
Ground truth: What to verify against
Agent type: Which specialized agent to use
Granularity: How to break down review
Severity levels: How to categorize issues
Skip dual verification when:
Use single agent when:
User: Review this implementation plan before execution
You: I'm using the dual-verification skill for comprehensive review.
Phase 1: Dual Independent Review
→ Dispatch 2 plan-review-agent agents in parallel
→ Each applies 35 quality criteria independently
→ Agent #1 finds: 3 BLOCKING issues, 7 NON-BLOCKING
→ Agent #2 finds: 4 BLOCKING issues, 5 NON-BLOCKING
Phase 2: Collate Findings and Present
→ Dispatch review-collation-agent
→ Collator compares both reviews
→ Present to user immediately:
Collated Report:
Common Issues (VERY HIGH):
- 2 BLOCKING issues both found
- 3 NON-BLOCKING issues both found
Exclusive Issues (MODERATE - cross-check starting):
- Agent #1 only: 1 BLOCKING, 4 NON-BLOCKING
- Agent #2 only: 2 BLOCKING, 2 NON-BLOCKING
Divergences: None
→ User notified: "Can `/revise common` now. Cross-check running..."
Phase 3: Cross-check Exclusive Issues (background)
→ Dispatch plan-review-agent to validate exclusive issues
→ For each exclusive issue, verify against requirements
→ Results:
- VALIDATED: 2 issues confirmed
- INVALIDATED: 3 issues don't apply
- UNCERTAIN: 1 issue needs user decision
→ User notified: "Cross-check complete. `/revise exclusive` or `/revise all`"
User: Audit README.md and CLAUDE.md for accuracy
You: I'm using the dual-verification skill for comprehensive documentation audit.
Phase 1: Dual Independent Review
→ Dispatch 2 technical-writer agents in parallel
→ Each verifies docs against codebase
→ Agent #1 finds: 13 issues (1 critical, 3 high, 6 medium, 3 low)
→ Agent #2 finds: 13 issues (4 critical, 1 high, 4 medium, 4 low)
Phase 2: Collate Findings and Present
→ Dispatch review-collation-agent
→ Identifies: 7 common, 6 exclusive, 0 divergences
→ Present to user immediately:
Collated Report:
Common Issues (VERY HIGH): 7
- Missing mise commands (CRITICAL)
- Incorrect skill path (MEDIUM)
- Missing /verify command (HIGH)
Exclusive Issues (MODERATE - cross-check starting): 6
- Agent #1 only: 3 issues
- Agent #2 only: 3 issues
→ User notified: "Can `/revise common` now. Cross-check running..."
Phase 3: Cross-check Exclusive Issues (background)
→ Dispatch code-agent to verify exclusive claims against codebase
→ Results:
- VALIDATED: 4 issues (paths really don't exist, examples really broken)
- INVALIDATED: 2 issues (files exist, agent #1 missed them)
- UNCERTAIN: 0 issues
→ User notified: "Cross-check complete. `/revise exclusive` or `/revise all`"
User: How does the authentication system work in this codebase?
You: I'm using the dual-verification skill for comprehensive research.
Phase 1: Dual Independent Research
→ Dispatch 2 Explore agents in parallel
→ Each investigates auth system independently
→ Agent #1 finds: JWT middleware, session handling, role-based access
→ Agent #2 finds: OAuth integration, token refresh, permission checks
Phase 2: Collate Findings and Present
→ Dispatch review-collation-agent
→ Identifies: 4 common findings, 3 unique insights, 1 divergence
→ Resolves divergence during collation
→ Present to user immediately:
Collated Report:
Common Findings (VERY HIGH): 4
- JWT tokens used for API auth (both found)
- Middleware in src/auth/middleware.ts (both found)
- Role enum defines permissions (both found)
- Refresh tokens stored in Redis (both found)
Exclusive Findings (MODERATE - cross-check starting): 3
- Agent #1: Found legacy session fallback for admin routes
- Agent #2: Found OAuth config for SSO integration
- Agent #2: Found rate limiting on auth endpoints
Divergence (RESOLVED):
- Token expiry: Agent #1 says 1 hour, Agent #2 says 24 hours
- → Verification: Config has 1h access + 24h refresh (both partially correct)
→ User notified: "Common findings ready. Cross-check running..."
Phase 3: Cross-check Exclusive Findings (background)
→ Dispatch Explore agent to verify exclusive claims
→ Results:
- VALIDATED: All 3 findings confirmed in codebase
- INVALIDATED: 0
- UNCERTAIN: 0
→ User notified: "Cross-check complete. All exclusive findings validated."
When to use this skill:
Related commands:
/cipherpowers:verify - Dispatches this skill for all verification types/cipherpowers:revise - Implements findings from verification (common, exclusive, all scopes)Other review skills:
Use dual-verification when stakes are high, use single-agent skills for regular work.
Mistake: "The reviews mostly agree, I'll skip detailed collation"
Mistake: "This exclusive issue is probably wrong since other reviewer didn't find it"
Mistake: "I'll combine both reviews myself instead of using collation agent"
Mistake: "Two agents is overkill, I'll just run one detailed review"
Mistake: "The divergence is minor, I'll pick one perspective"
/revise common)/revise common while cross-check runsnpx claudepluginhub cipherstash/cipherpowers --plugin cipherpowersPerforms iterative swarm review of plans or code using parallel agents in 4 escalating rounds to find issues missed by single-pass review. Use for plans >500 lines, >3 components, or code audits.
Dispatches parallel specialist review agents for code diffs, PRDs, or implementation plans. Operates as a pre-PR quality gate or via /review command.
Reviews generated/updated documentation (MD files, beads issues, specs, task lists) with multi-LLM parallel analysis for inconsistencies, codebase mismatches, gaps. Interactive synthesis and fixes.