Coding Plans That Lower Agent Cost

When teams rehearse rollbacks, we keep seeing the same fragile shortcut review threads that become archaeology instead of inspection. When in doubt, shrink scope and widen transparency.

Coding Plans That Lower Agent Cost Review Pattern

Trust does not scale when receipts stay in chat. The expensive bug is permission drift nobody signed.

We believed local greens equaled team-wide confidence. We rehearsed that playbook with teams whose durable contracts were still mushy.

Westrum’s generative culture lens fits backwards here: signals looked open while accountability stayed vague.

Governance is velocity once surprises stop scaling.

We wrote this note because teams confuse green CI with explainable delegation.

Team Practice

Review queue theater. If CI is green, you still have reviewers asking “why this approach?” with no written answer. The failure is not usually tool quality; it is the missing operating contract.

Use Decision stub. PR template forces three lines: constraints considered, rejected alternatives, verification proof.

What changes: Debate moves from vibes to explicit tradeoffs. Governance is velocity once surprises stop scaling.

Keep that as the first guardrail.

Cursor scope fog. You can spot this when you have watched .mdc language sound precise until reviewers argue what it meant.

Why it keeps recurring: Rules compete with chat memory—split-brain coordination without a scope ledger.

The practical fix is Scope ledger: Parent chat carries a five-line ledger: goal, allowed paths, forbidden paths, verification command, merge owner.

The evidence is mundane and useful: review shifts from debating prompts to checking ledgers against diffs. Governance is velocity once surprises stop scaling.

That is the move that makes review cheaper.

Claude permission creep. If you run Claude Code on shared laptops, you have seen bash approvals become muscle memory. The failure is not usually tool quality; it is the missing operating contract.

Use CLAUDE.md supremacy clause. Top of CLAUDE.md: which hooks win, which folders require human eyes, and where temporary overrides live.

What changes: Sessions stop inventing policy mid-run because precedence is written. Governance is velocity once surprises stop scaling.

Keep that as the first guardrail.

Codex replay gaps. If you rely on Codex CLI, you have merged greens where reviewers never saw the transcript.

The trap is CLI convenience hides verification theater—commands ran, narrative did not.

Named fix: Replay sandwich. AGENTS.md mandates: intent line → command transcript → diff summary before PR.

After the fix, review becomes reproducible without standing behind someone’s terminal. Governance is velocity once surprises stop scaling.

It turns agent output back into team-owned work.

---
description: Delegation boundary snapshot (adapt globs to your repo)
globs:
  - "**/*"
alwaysApply: false
---

- Cursor: keep scopes explicit in `.mdc`; forbid undeclared MCP domains.
- Claude Code: cite `CLAUDE.md` precedence before expanding bash scope.
- Codex: ensure `AGENTS.md` carries replay-friendly verification notes for CLI runs.

We map this discipline to our methodology under Review—evidence beats narration when merges touch shared surfaces.

Think of agents as signal amplifiers—they multiply whatever clarity already exists in files, hooks, and scopes.

Reviewer artifact

Merge check

• Forked agent work lists parent + child responsibilities.
• Red-folder paths received explicit human acknowledgement.
• Scopes in the PR body match folders in the diff.
• Primary-doc links were smoke-checked after publishing edits.

Where It Stops

None of this replaces architecture judgement—agents accelerate execution, not ownership.

Source Notes

• OWASP — Top 10 for Large Language Model Applications

• NIST — AI Risk Management Framework

• Google Search Central — helpful, people-first content

• Google Search Central — generative AI content guidance

• Model Context Protocol — specification

• Cursor — Agent

• OpenAI Skills repository

Best ways to use this research

• Best for: Cursor teams deciding which rule, subagent, skill, or MCP boundary to standardize next around “Coding Plans That Lower Agent Cost.”
• Best first artifact: turn the named fix into a .mdc rule, AGENTS.md note, subagent receipt, or review checklist before the next automated run.
• Best comparison angle: compare the workflow against the current Cursor review path, connector scope, and team rule file; keep the path that leaves the shortest auditable trail.

Next Move

If you want one concrete habit change this week, start from Agentic coding governance and paste your receipt template into the PR body before asking for review.