Dissect

Dissect

Leading words: dissect, ground truth, entity-level, minimal-build, red-team, evidence-backed, stub detection, naming audit, fold test, phase separation, patch in place.

Systematically interrogate and optimize an existing service, written plan, or system. The goal is not to rubber-stamp the current design — it is to arrive at the minimal-build plan that correctly meets the requirements, by challenging every assumption with live evidence and an adversarial review panel.

Trigger: /dissect <target> where <target> is a service name, plan file path, codebase area, or free-form description. If omitted, ask.

dissect is the backward-looking counterpart to deep-deliberation. They share DNA — parallel read-only sub-agents, devil's-advocate red-teaming, human checkpoints, evidence over intent — but point in opposite directions: deliberation designs what to build; dissect audits what already exists.

User Input

$ARGUMENTS

Core principles (never waive)

1. Ground truth beats intent. What the code actually does overrides what the plan says it should do. Always verify live.
2. Row counts are a liveness signal only. A 0-row table can be load-bearing; a populated table can be redundant. Never use row count as a keep/drop reason.
3. Name what it IS, not what it was named. Entities are frequently misnamed. Read a few actual records before drawing conclusions. A table called contact_preference might store food allergies and golf equipment.
4. Own vs read. "Entities this service reads" ≠ "entities this service owns." Reading a table does not mean you should count it in the domain.
5. Stubs are not live. A function that throws new Error('not implemented'), a cron that no-ops, or a consumer that re-queues to the DLQ is not a running feature. Check before counting it as active behavior.
6. Minimal build. Every proposed change must trace to a requirement. Do not design for hypothetical future use. Three similar things beat a premature abstraction.
7. Naming audit is phase zero. Naming confusion causes the most incorrect verdicts. Run it before any verdict.
8. Sub-agents return evidence, the orchestrator returns verdicts. A sub-agent that declares "VERDICT: DROP" unprompted is overstepping. Synthesis happens in the main context where all evidence is held together.
9. Escalate discrepancies, don't resolve them silently. If code says X and the plan says Y, surface both at the checkpoint and let the human decide.
10. Patch in place — never rewrite the live plan. If the session is in Cursor Plan Mode or Claude Plan Mode, or the target is an existing plan document, the source plan is the document of record. Dissect it, then surgically update it (fix, tune, fill gaps). Never full-file Write it. Never create a second plan that replaces it. Unaddressed sections stay verbatim. Read references/plan_preservation.md before any write. Override only if the human explicitly asks to rewrite from scratch.

Pipeline overview

USER input (service / plan / codebase area)
   ↓
[Stage 0] Intake + Naming Audit                 (1 explore sub-agent)
   🛑 CHECKPOINT 1 — human confirms names + scope boundary
   ↓
[Stage 1] Multi-source Ground Truth             (3 explore sub-agents, parallel)
[Stage 2] Entity-level Devil's Advocate         (1 explore sub-agent per cluster)
   🛑 CHECKPOINT 2 — human reviews per-entity verdicts
   ↓
[Stage 3] Cross-cutting + Adversarial Red-Team  (system challenge + ToT branches)
[Stage 4] Synthesis + Minimal-Build Plan        (orchestrator, main context)
   🛑 CHECKPOINT 3 — human picks the execution branch

Copy this checklist and track progress out loud:

Progress:
- [ ] Stage 0: Naming audit
- [ ] CHECKPOINT 1 — names + scope confirmed
- [ ] Stage 1: Multi-source ground truth (DB + code + plan, parallel)
- [ ] Stage 2: Entity-level devil's advocate (one agent per cluster)
- [ ] CHECKPOINT 2 — entity verdicts reviewed
- [ ] Stage 3: Cross-cutting challenges + ToT refactor branches + red-team
- [ ] Stage 4: Synthesis → minimal-build plan
- [ ] CHECKPOINT 3 — execution branch chosen

Right-size the pipeline. This is heavy. For a small target (a handful of entities, one file) collapse Stages 0–2 into a single pass and skip the parallel fan-out — but never skip the naming audit and never skip Checkpoint 1.

Stage 0 — Intake + Naming Audit

Surface naming confusion that could corrupt every later verdict, before any analysis. Dispatch one read-only (explore) sub-agent:

Prompt: Naming audit for <target>.

For every entity (table, field, service, component, endpoint) in scope:
  1. Does the name accurately describe what it actually holds/does?
  2. Is there another entity with a similar name it could be confused with?
  3. Read 2–3 actual records (or the code body) and compare to the name.
     Flag any mismatch.

Return a table only (no verdicts):
  Entity | What name implies | What it actually contains | Mismatch?

If the session is already in Cursor Plan Mode or Claude Plan Mode and the user did not name a different target, the target is the current plan document. Record its path. Read references/plan_preservation.md now — before any write.

🛑 Checkpoint 1

Present the naming table and your proposed scope boundary (what this target owns vs merely reads). Ask the human to confirm corrected names and scope before proceeding. A mismatch here changes the verdicts in every later stage. Do not proceed until confirmed.

Stage 1 — Multi-source Ground Truth

Gather evidence from all three sources simultaneously via parallel read-only sub-agents. Each source catches what the others miss.

Launch three explore sub-agents in parallel (one message, three Task calls):

A — Live introspection: every in-scope entity (name, fields, types, descriptions), 2 sample records each, row counts (liveness only), and FK/ownership relationships.

B — Code evidence: every file that reads/writes each entity (file:line); whether each reader/writer is live or a stub; the module that OWNS each entity vs those that merely READ it; any code using the wrong entity for its purpose.

C — Plan / spec / migration evidence: the original design doc, migration history (before/after), documented decisions, what was explicitly deferred or descoped, and what the plan SAYS is live vs what code/DB show.

Synthesize the three outputs. Note every discrepancy between sources — that is where the real problems live.

Stage 2 — Entity-level Devil's Advocate

For each entity cluster (group related entities), dispatch one focused explore sub-agent that challenges every verdict. One cluster = one agent. Never batch unrelated clusters — context pollution corrupts both verdicts.

Standard question set (apply to every entity):

For entity <X>:
1. PURPOSE   — Plain terms: what does it do? What breaks if it vanished tomorrow?
2. OWNERSHIP — Does <service> own it, or merely read it from another domain?
3. NAME      — Does the name match the data? (Reference Stage 0.)
4. EVIDENCE  — Live code that reads AND writes it? file:line each. Writers but no
               readers (or vice-versa) → flag. Read by a service that shouldn't
               own it → flag.
5. FOLD TEST — Can it be absorbed into a parent? (See fold tests below.)
6. PII/BOUNDARY — Personal data? Which DB/domain should it live in? Match current?
7. STUB CHECK — Is the using code live, or a stub/throw/no-op?
8. VERDICT   — Propose from the dynamic taxonomy below, justified with evidence.
               Never justify with row count.

🛑 Checkpoint 2

Present per-entity verdicts as a table (Entity | Proposed verdict | Evidence). Ask the human to confirm, override, or request more evidence before the system-level stage. Wait for the answer.

Dynamic verdict taxonomy

KEEP / FOLD / DROP is too rigid — it only fits relational tables. A dissection target may be a written plan, a runtime flow, or a coupled module, so verdicts are action-oriented and target-aware. The full taxonomy (KEEP, FOLD, DROP, DEFER, ON-DEMAND, EXTRACT, RE-HOME, REFACTOR, OUT-OF-SCOPE) with meanings, plan-vs-code typicals, and the distinctions that matter (RE-HOME vs EXTRACT, DEFER vs DROP, ON-DEMAND vs KEEP) lives in references/verdict_taxonomy.md.

Each verdict must cite evidence (file:line or live DB), never row count. Pick the most precise verdict from the taxonomy.

Stage 3 — Cross-cutting challenges + adversarial red-team

After entity verdicts, challenge the system-level design, then red-team the emerging plan from independent adversarial angles. This is where dissect borrows deep-deliberation's Tree-of-Thought and red-team machinery.

3a. System-level questions (one explore sub-agent)

1. Send/process model — Is there pre-staging/pre-rendering/pre-computation that could be deferred to the moment it's needed? What's the throughput ceiling?
2. Feedback loops — When something fails (bounce, rejection, error), is the signal captured and acted on, or is the feedback path a stub?
3. Ownership boundaries — Where does this service read/write data that belongs to another? Any misuse of another domain's tables?
4. Naming & taxonomy — Are concepts that share a name actually different things (kind vs channel vs group)? Conflation causes the worst bugs.
5. Live vs designed — For each major feature, is it actually running or a stub/planned/throw? List what is NOT live that the plan implies is live.

3b. Tree-of-Thought refactor branches (orchestrator)

Do not assume a single target state. Generate 2–4 distinct end-states for the optimization, each with idea, pros/cons, main risk, and rough effort (S/M/L). Example axis for a storage-heavy target:

• Branch A — ON-DEMAND: compute at read, zero new storage.
• Branch B — FOLD/JSONB: absorb into parent, flexible, fewer joins.
• Branch C — hard relational consolidation: columns + strict keys. Prune dominated branches and say why. Recommend one + a runner-up.

3c. Adversarial red-team panel (parallel explore sub-agents)

Launch independent personas in parallel; each attacks first, then concedes what survives, and returns evidence — not a final verdict. Minimum panel:

• Zero-Utility Hawk — argues to DROP or FOLD every entity; forces each KEEP to earn its place against live evidence.
• Migration-Risk Hawk — red-teams the proposed plan itself: does the migration create more downtime/risk than leaving the mess in place?
• Boundary Hawk — hunts ownership/PII violations and wrong-domain reads.
• Stub Hunter — proves which "features" are actually live vs throws/no-ops/DLQ.

(Reuse the deep-deliberation persona prompt shape: identity → relevant file paths → approach under review → attack, then concede, then evidence.)

Stage 4 — Synthesis + minimal-build plan

Done in the main context (synthesis needs all evidence held together). Output:

0. Naming corrections — every mismatch found, with corrected names (apply throughout). 1. Scope boundary corrections — entities wrongly counted in this domain; the real owner of each; any live code that incorrectly crosses the boundary. 2. Entity verdicts — one table: Entity | Verdict | Rationale (file:line / live evidence) | Lands (if FOLD/RE-HOME). No row-count justifications. 3. System-level changes — for each cross-cutting issue, in this format:

• Decision: [what]
• Why: [evidence-backed reason]
• Other options: [alternatives + why rejected] 4. Bug / misuse log — places where code uses the wrong entity or wires an entity to the wrong system. Correctness issues, distinct from optimization. 5. Execution order — the minimal-build sequence: highest-value/most-independent first, what depends on what, what to defer. 6. Deferred / out of scope — what is intentionally NOT changing, each with a reason.

The six sections above are the dissection report (chat). They are not a replacement body for an existing plan file.

Plan Mode / existing plan document

If the session is in Cursor or Claude Plan Mode, or the target is an existing plan file: do not emit a new plan. Follow references/plan_preservation.md. Build a patch map (KEEP / PATCH / APPEND / FLAG), apply surgical edits after Checkpoint 3, and preserve every unaddressed section. APPEND is how newly identified gaps land in the plan — they are added, not used as a reason to rewrite.

🛑 Checkpoint 3

Present the report led by a plain-terms summary (for the product owner) followed by the technical detail (for the engineer), with the recommended ToT branch and ranked alternatives. If a live plan is being patched, also present the patch map. Ask the human which branch to execute (and, if patching, to confirm the map). Do not start implementing unless they ask. Do not touch the plan file until they confirm.

Fold tests (reference)

The full fold-test table (cardinality → fold type → blocker, plus the independent-relational-access check and the PII/DB-boundary rule) lives in references/fold_tests.md.

Quick reference:

• 1:1 with parent → columns on parent (just do it).
• 1:N bounded (≤~10) → JSONB on parent, unless independent relational access is needed.
• 1:N unbounded/queried, N:M → keep as table.
• Never fold across a PII/DB boundary.

Sub-agent dispatch rules

• Parallel for the Stage 1 triple (DB + code + plan) — independent, run at once.
• One cluster per Stage 2 agent — never mix unrelated clusters.
• Read-only only. All dissection agents use subagent_type: "explore". No write access. Do NOT pass a model — sub-agents inherit the parent model.
• Agents return raw evidence, not verdicts. Synthesis is the orchestrator's job. Escalate discrepancies to the checkpoint; never resolve them silently.

Key lessons (baked in)

• Read the actual data first. A table named managed_preference might contain "Favorite Drink → Moscow Mule." You would never know without reading it.
• Channel ≠ kind ≠ group. Multiple orthogonal taxonomies get conflated; that produces wrong verdicts. Keep them distinct.
• "Built for" vs "used for." A table built for one purpose can be misused for another. If design intent and actual use diverge, that's a bug, not a design.
• The eligibility/read pipeline is not authoritative. What a pipeline reads doesn't define the correct data model — it may be reading the wrong thing.
• Stubs inflate the system. A cron that throws, a consumer that re-queues, a client that returns permanent_failure for all inputs — none are live.
• Plan and code diverge. The plan is intent; the code is reality. Ground the optimization in reality.

Output format notes

• Every verdict cites evidence. No bare assertions.
• Every FOLD/RE-HOME states the target it lands in and which fold test applies.
• Every OUT-OF-SCOPE names the correct domain owner.
• Every DROP names the reason (no code path / derivable / moved / legacy).
• Every DEFER/ON-DEMAND names the requirement that justifies the seam (or its absence).
• Row count appears only as liveness context, never as a reason.
• Lead with plain-terms summaries, then technical detail. Write both.

References