Plan Review -- 3-Agent Multi-Perspective Audit

Review .context/plans/ files through 3 independent lenses: Technical, Strategic, and Risk. Each reviewer is a separate subagent with a unique prompt and perspective. The main agent collates results into a consolidated report.

This catches what a single reviewer normalises -- each subagent brings a fresh set of assumptions and focus areas.

Prerequisites

• A .context/plans/*.md file exists to review (or a glob selecting multiple)
• The plan has standard YAML frontmatter (title, type, status, date)
• Your environment supports spawning general and explore subagent types

Quick Start

# No CLI commands -- this is an agent workflow skill.
# Load the skill, then say: "review the plan at .context/plans/<name>.md"

When to Use

• A .context/plans/*.md file needs an independent multi-perspective review before implementation
• A draft plan needs validation before marking it READY
• Multiple plans exist in the same domain and need prioritisation
• A stale plan needs a freshness check against current project state
• The user explicitly asks for a plan audit

When NOT to Use

• For one-off notes, scratch files, or non-plan documents -- use session-reflection instead
• For plans outside .context/plans/ -- the reviewer prompts assume .context/ frontmatter conventions
• When the plan is trivially small (1 paragraph, no steps) -- the overhead of 3 subagents is not justified
• When the user explicitly asks for a quick opinion, not a full audit

Mindset

• Three independent reviewers catch what a single reviewer normalises. The value is in the divergence between their findings, not in consensus.
• Model diversity is the strongest lever for perspective diversity. PREFER routing each reviewer to a different model UNLESS the environment genuinely offers no routing (see Advanced: Model Routing Configuration).
• A plan review is a service to the plan author, not a judgement. Findings should be actionable, not critical.
• Structural validation is a prerequisite, not the goal. The frontmatter check exists to keep the plan visible in the index, but the real value is the implementation architecture and risk analysis from the 3 reviewers.
• If a review reveals a critical issue, the right outcome is to improve the plan, not to reject it.
• BY DEFAULT, classify every critical/moderate finding as Editorial or Decision (Step 10) before calling the review finished. TYPICALLY most structural gaps are Editorial (one clearly correct fix); RECOMMENDED to reserve the Decision bucket, and its interview, for genuine tradeoffs only -- AVOID interviewing the user on something that was never actually in question.

Workflow

1. Identify the plan to review

The user specifies a plan path, or you suggest one from .context/plans/. Read the plan in full. Note its frontmatter (status, date, related), goal, steps, open questions, and risks.

2. Compose the plan brief

From the plan file, create a structured brief that all 3 reviewers will receive. The brief must be self-contained -- each reviewer should not need to read the original plan file. Include:

• Title, status, date -- from frontmatter
• Goal -- the plan's stated objective (verbatim if concise, summarised if long)
• Steps -- numbered list of implementation steps
• Dependencies / related files -- from related: frontmatter
• Open questions -- listed verbatim
• Known risks -- listed verbatim from the plan's risk section (if any)
• Implementation status -- what's already been done vs what's still pending
• Context -- any relevant background from related findings or docs

3. Validate plan structure against the standard trio

Every .context/ plan should follow a three-part standard: a YAML template defining required fields, a JSON schema for machine validation, and a validation script. Check the plan against all three.

The trio

What to check

Run the validation script (from the context-index skill) on the plan file:

validate-context-frontmatter.sh .context/plans/<plan-file>.md

This checks:

• Frontmatter exists and opens/closes with ---
• All required fields present (title, type, status, date)
• type is one of the allowed values (PLAN, FINDING, ANALYSIS, INSTRUCTION, AUDIT, FOLLOW-UP, LEARNING, HANDOVER, KNOWN-ISSUE)
• status is one of DRAFT, READY, ACTIVE, DONE, SUPERSEDED, DEFERRED (READY applies to PLAN only — see the project's planning-flow documentation)
• date matches YYYY-MM-DD pattern
• No extra fields beyond those defined in the schema

If validation passes

Include **Structure: Valid** in the plan brief. Proceed to model selection.

If validation fails

Capture each validation error and include it in the plan brief under a ## Structural Issues section so all 3 reviewers can reference them. Sample:

## Structural Issues
- Missing required field: 'status'
- 'date' does not match pattern YYYY-MM-DD, got '01-07-2026'

Plan body structure -- infer the local standard

Beyond frontmatter, check the plan's body sections (## headings) against what other plans in this repo actually use. Do NOT hardcode a template -- scan the existing plans and infer what's conventional. See Structural Inference Reference for the frequency-table method, the core/common/rare classification, and why this is inferred rather than hardcoded.

What to report

Include in the plan brief under ## Structural Issues:

### Body Structure (inferred from <N> existing plans)
Core sections (≥40% of plans):
  - Goal: present/missing
  - Steps/Phases: present/missing
  - Open Questions/Decisions: present/missing

Common sections (20-39%):
  - Scope/Out of scope: present/missing
  - Related findings: present/missing
  - Verification: present/missing
  - Risks/sequencing: present/missing

Note: Sections like Background, File-by-file change list, Academic References,
and Critical Review appear in <20% of plans and are optional.

Missing core sections are advisory warnings; missing common sections are neutral observations; rare/unique sections may indicate scope creep -- note them as "unusual sections" but do not flag them as problems. See the reference above for the full rationale.

Implementation architecture -- Phases, Tasks, and Waves

A well-structured plan divides the work into Phases (sequential stages), Tasks (independently assignable units within a phase), and Waves (groups of tasks within a phase that can run in parallel). Check for missing phase dependencies/exit criteria, oversized or flat (ungrouped) phases, vague task descriptions, and unidentified parallelisation opportunities -- see Structural Inference Reference for the full bad-pattern list and check criteria.

What to report

Include in the plan brief under ## Structural Issues:

### Implementation Architecture
Phases: <N> phases identified -- <list phase names>
   - Phase dependencies: explicit/implicit/missing
   - Phase exit criteria: present for <N>/<N> phases

Task granularity: good / too vague / too large
   - <count> of <total> tasks have actionable descriptions

Parallelisation:
   - Waves identified: yes/no
   - Tasks flagged as parallel: <N> of <N>
   - Parallelism opportunity: <N> tasks could run concurrently but aren't grouped

4. Check opencode.json for existing model config

Before asking the user anything, check whether opencode.json already has subAgents configured:

cat opencode.json | python3 -c "import sys,json; c=json.load(sys.stdin); print('configured' if c.get('subAgents') else 'not-configured')"

If subAgents is configured with at least two distinct models, note the mapping and proceed to compose the plan brief (skip model selection -- the user already configured it). Include the model assignments in the final report.

If not configured, proceed to step 5 and advise the user.

5. Ask the user which models to use

Do NOT proceed without asking. The agent should proactively advise based on what it detects. First check if this is a native Anthropic CLI harness or OpenCode by looking for environment cues (e.g., a CLAUDE_CODE-style env var, or ANTHROPIC_API_KEY is set). If you cannot determine the environment, ask:

"Are you using OpenCode, or a native Anthropic CLI harness? This determines which models are available for the subagent reviewers."

Use the appropriate guidance below.

Present the pricing/pairing table for the detected environment (OpenCode Zen, OpenCode Go, native Anthropic CLI harness, or BYOK) via the question tool -- see Model Routing Reference for the full tables, example question payloads, and the default "not sure" pairing per environment. The goal is always to assign one model to Technical + Strategic (general subagent type) and a different model to Risk (explore subagent type) -- different models mean different blind spots. If the user picks "Custom", ask them for each reviewer individually and suggest sensible defaults based on their chosen model.

6. Map model choices to subagent configuration

If the user wants to configure opencode.json, show them the snippet:

{
  "subAgents": {
    "general": {
      "model": "<chosen Technical/Strategic model>",
      "systemPrompt": "You are a thorough, detail-oriented reviewer."
    },
    "explore": {
      "model": "<chosen Risk model>",
      "systemPrompt": "You are a skeptical, adversarial reviewer focused on finding flaws."
    }
  }
}

Ask if they want to apply this now or proceed with current routing (may use the same model for all types). If they proceed without configuration, run all 3 but note in the output that model diversity was limited -- the reviewer prompts alone provide the perspective separation.

7. Spawn 3 reviewers (in parallel)

Spawn all 3 subagents at once using the task tool. Each receives the same plan brief prefixed with their role-specific instructions.

Reviewer 1: Technical

Use this prompt template with the plan brief inserted:

{
  "subagent_type": "general",
  "description": "Technical review of plan",
  "prompt": "You are a TECHNICAL REVIEWER evaluating a plan. Your focus: feasibility, implementation gaps, technical correctness, and completeness.\n\nAnswer these questions with specific, actionable items:\n\n1. FEASIBILITY: Are the implementation steps technically sound? Identify any steps that are ambiguous, under-specified, or impossible as written.\n\n2. GAPS: What specific details are missing? (e.g., missing error handling, no test strategy, no rollback plan, missing configuration). Be precise -- reference step numbers.\n\n3. CONSISTENCY: Do the steps internally agree? Any contradictions in approach, ordering, or assumptions?\n\n4. EFFORT ESTIMATE: Is the effort realistic for the scope? Identify any steps that look under- or over-scoped.\n\n5. DEPENDENCIES: Are all prerequisites and dependencies called out? Any implicit ones that should be explicit?\n\nPLAN BRIEF:\n<PASTE PLAN BRIEF HERE>"
}

Reviewer 2: Strategic

{
  "subagent_type": "general",
  "description": "Strategic review of plan",
  "prompt": "You are a STRATEGIC REVIEWER evaluating a plan. Your focus: goal alignment, scope, priority, and completeness relative to objectives.\n\nAnswer these questions with specific, actionable items:\n\n1. GOAL ALIGNMENT: Does every step clearly serve the stated goal? Identify any steps that are off-track, scope-creep, or not connected to the goal.\n\n2. SCOPE: Is the scope right? Too narrow (misses important outcomes) or too broad (trying to solve everything)?\n\n3. PRIORITY: Are the steps in the right order? Identify sequencing issues -- steps that should come earlier or later, or missing prerequisites.\n\n4. COMPLETENESS: Are there obvious missing steps or phases? What would a reasonable person expect that isn't here, including whether stated execution paths actually reach far enough to meet the goal?\n\n5. SUCCESS CRITERIA: Does the plan define what 'done' looks like? If not, what's missing?\n\nPLAN BRIEF:\n<PASTE PLAN BRIEF HERE>"
}

Reviewer 3: Risk

{
  "subagent_type": "explore",
  "description": "Risk review of plan",
  "prompt": "You are a RISK REVIEWER evaluating a plan. Your focus: blind spots, edge cases, failure modes, and unstated assumptions.\n\nAnswer these questions with specific, actionable items:\n\n1. BLIND SPOTS: What is the plan not considering? Look for implicit assumptions that could be wrong, stakeholders not mentioned, or system boundaries not considered. If the plan states where or how a mechanism executes (a hook, a CI job, a trigger, a caller), explicitly assess who or what bypasses that path and whether the stated goal is actually met given that reach.\n\n2. FAILURE MODES: For each step, what's the most likely failure? What's the worst-case outcome? Be specific -- reference step numbers.\n\n3. EDGE CASES: What scenarios would break this plan? Consider: incomplete data, external dependencies failing, concurrent changes, user error.\n\n4. RECOVERY: If a step fails, is there a rollback or recovery path? Identify steps where failure = irreversible or costly.\n\n5. RESILIENCE: How brittle is this plan? Could small changes in assumptions invalidate large parts of it?\n\nPLAN BRIEF:\n<PASTE PLAN BRIEF HERE>"
}

8. Receive and collate results

Each subagent returns a structured review. Collect all 3 and compile a Consolidated Review Report following the structure defined in assets/templates/review-report.yaml. The template is validated against assets/schemas/review-report.schema.json -- run scripts/validate-review-report.sh on the generated report to confirm schema compliance.

Required sections: Model Configuration, Structural Validation, Implementation Architecture, Scores, Critical Issues, Moderate Concerns, Strengths, Next Actions.

9. Present to the user

Present the consolidated report with a preamble that includes the models used:

"I ran this plan through 3 independent reviewers using model A (Technical/Strategic) and model B (Risk). Here's the consolidated report:"

If the user wants to dig deeper on any finding, offer to spawn a follow-up investigation subagent with the relevant context.

10. Classify findings and resolve -- this step is not optional

Step 9's presentation is a progress update, not sign-off. Before the review counts as finished, sort every item in critical_issues and moderate_concerns into one of two buckets:

• Editorial -- a contradiction, missing detail, wrong ownership, or unspecified mechanism with one clearly correct fix given the rest of the plan and this repo's existing conventions. No real tradeoff exists; a competent engineer looking at the same facts would land on the same fix. ALWAYS apply these directly to the plan file -- don't make the user approve something that isn't actually a choice.
• Decision -- a genuine tradeoff with two or more valid answers (hard-fail vs. advisory rollout, gate-on-condition vs. run-unconditionally, spike-first vs. attempt-and-recover). No amount of re-reading the repo resolves these; only the plan owner's judgment does.

For decision-classified items, NEVER leave them sitting in ## Open Questions for the user to notice later -- run a short interview immediately: one question at a time, each with concrete mutually-exclusive options plus room for free text, matching guided-interview's pattern. End with a one-message recap of every answer and get explicit confirmation before writing anything into the plan.

Fold both outcomes back into the plan file, not just into chat:

• Editorial fixes land directly in the relevant section (Scope, Phases, Verification).
• Decisions land in a ## Decisions section, each with the chosen option and why the alternative didn't win. If a decision carries a review-later condition (e.g. "flip to hard-fail after N clean runs"), state it as a concrete, checkable revisit trigger -- never "revisit later" -- the same rule design-debate enforces on its own verdicts.
• A ## Decisions heading is itself an ADR-capture trigger in this repo (check-undocumented-decisions.sh flags any ## Decision heading and fails hk's pre-commit check). Check whether an existing ADR already covers the plan's topic; if not, run adr-capture before treating the amendment as done -- this is a hard gate, not a suggestion, since the pre-commit hook will block the commit either way.

11. (Optional) Persist a standalone finding

If the review surfaced something beyond this one plan -- a pattern likely to recur in future reviews, a gap in a related skill -- capture it as a finding via context-file, separate from the decisions already folded into the plan in Step 10.

Anti-Patterns

NEVER -- Skip the plan brief and just pass the file path

WHY: Subagents cannot read files unless they have the general type with file access. The plan brief ensures every reviewer works from the same complete information regardless of subagent capability -- skipping it produces shallow, inconsistent, self-contradicting reviews.

BAD: Sending "review .context/plans/foo.md" as the prompt. GOOD: Extracting the plan content into a self-contained brief first.

NEVER -- Spawn reviewers sequentially

WHY: They are fully independent -- sequential spawning wastes 3x the time and lets context build up between calls. Always use parallel tool calls.

BAD: Spawn Technical, wait for result, spawn Strategic, wait, spawn Risk. GOOD: Spawn all 3 in one message with 3 parallel task tool calls.

NEVER -- Proceed without asking about models first

WHY: Model diversity is the main lever for catching different blind spots. Asking first gives the user control over cost vs. depth; skipping it silently defaults to one model for all reviewers, and the user loses trust when they discover routing was available but unused.

BAD: "Reviewing the plan now with 3 reviewers..." GOOD: "Before I start, which models should I use for the reviewers?"

NEVER -- Present raw subagent output without attribution

WHY: The user needs to know which perspective each finding comes from -- raw, unlabelled output mixes actionable findings with noise and loses the multi-reviewer value entirely.

BAD: Paste three blocks of text with no headers. GOOD: Organise by reviewer with clear headings and attribution.

NEVER -- Modify the plan brief differently per reviewer

WHY: The whole point is that different reviewers reach different conclusions from the same information. A different brief per reviewer turns real disagreement into an artefact of different input, hiding true consensus and wasting time on false conflicts.

BAD: Giving the Strategic reviewer extra context about project history. GOOD: Identical brief to all 3; the differences in output come from their lenses.

NEVER -- Use the same subagent type for all 3 reviewers

WHY: Model diversity is the main lever for catching different blind spots. Using the same subagent type for all 3 loses the independent-perspective benefit -- they converge on similar blind spots, so the review costs 3x but delivers the value of one pass.

BAD: All 3 use general. GOOD: Mix general and explore (and more if your opencode.json routes them differently).

NEVER -- Leave a decision-type finding sitting in Open Questions after the review

WHY: A report is a snapshot, not a commitment. Presenting findings (Step 9) and resolving them (Step 10) are different steps -- skipping from one to "the review is done" ships the plan with a real tradeoff unresolved, against whichever reading happened to be top of mind rather than a decision anyone actually made.

BAD: Present the consolidated report, thank the user, stop. GOOD: Present the report, then interview the user on every decision-type finding before treating the plan as amended (Step 10).

Verification

After presenting the consolidated review report, run these checks before signing off:

1. Schema compliance -- run the validation script to verify the report output:

   scripts/validate-review-report.sh <path-to-report>

   This checks the report conforms to the required structure and all sections are present. Re-run if validation fails.

2. Model attribution check -- confirm the report states which models were used for Technical/Strategic and for Risk, and whether routing was pre-configured or user-selected.

3. Structural validation captured -- confirm the plan's frontmatter validation results and body structure inference are included in the report. The structural validation must pass before the review is considered complete.

4. Actionability review -- verify the report ends with specific Recommended Next Actions that reference specific reviewer findings. Each action must be concrete and directly address a finding.

5. Investigation offered -- ask the user if they want to dig deeper on any finding. If they accept, run the investigation before concluding.

6. Every critical/moderate finding is classified and resolved -- confirm each item from critical_issues and moderate_concerns is either applied as an editorial fix in the plan file, or answered through the Step 10 interview and recorded in a ## Decisions section. Run grep -c '^- ' <finding-list> against the plan's diff if unsure whether anything was dropped.

If any of these checks fail, correct the issue before presenting the report as final.

Error Handling

When a Reviewer Fails

If a subagent reviewer returns an error or times out, do not block the entire review. Spawn a replacement using the same subagent type and brief. If the replacement also fails, omit that perspective and proceed with the remaining reviews. Note the failure in the final report so the user knows a perspective is missing.

Templates

This skill follows the repository convention of YAML template + JSON Schema + validation script for all structured artifacts. See the project rules for the convention.

References