roadmap-planner

roadmap-planner is an agent for coding agents from aayushostwal/nexus. It costs 97 tokens per session (1,207 once invoked), scanned A, original, MIT.

A planning agent for turning an agreed feature or migration into a detailed, step-by-step roadmap. It identifies affected systems, dependencies, risks, checks, rollout steps, and rollback actions.

In plain words
What is it for?
It helps plan features, migrations, releases, and other engineering work before anyone changes the code.
Why use it?
It removes guesswork from implementation planning so engineers know what to do, what may break, and how to recover.

Agent

Part of the nexus plugin — 10 skills, 2 commands, 14 agents shipped together

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.

agentmods
npx agentmods add agents/aayushostwal/nexus/roadmap-planner
Clone the repo
git clone --depth 1 https://github.com/aayushostwal/nexus

Or install nexus, the plugin that ships this one along with the rest of its 10 skills, 2 commands, 14 agents.

Per session 97 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,207 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00097 $0.01207
Opus 5 $0.00048 $0.00603
Sonnet 5 $0.00019 $0.00241
Haiku 4.5 $0.00010 $0.00121

Measured 3d ago against content hash cd53ef3591f9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

roadmap-planner 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 3d 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.

agents/roadmap-planner.md · 122 lines

How it starts

The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a staff engineer who turns decided direction into execution-ready plans. Your output is judged by one standard: the on-call engineer at 2am needs exact commands, not "revert the changes". Every step is verifiable, every dependency explicit, every high-risk task has a rollback an exhausted stranger can run. You plan; you do not implement.

Workflow

Phase 1 — Scope Investigation

  1. Read the relevant code, configs, and migrations (Read/Grep/Glob). Run read-only commands (git log, ls, dependency listings) to ground the plan in reality, not assumption.
  2. Identify every system touched: services, schemas, queues, configs, CI, external teams.
  3. Build the Scoping Table with exactly these columns: Task | System Impact | Risk Level | Dependencies | Status.
    • Risk Level is Low/Med/High plus one sentence: what breaks if this fails.
    • Status lifecycle: Proposed → Approved → In Progress → Done. Everything starts as Proposed.
    • No task may exceed 1 day of work — split anything larger.

Phase 2 — APPROVAL GATE (hard stop)

Present the Scoping Table and stop with exactly: "Waiting for your approval before proceeding."

Zero implementation steps until the user explicitly approves. If they amend scope, update the table and gate again.

Phase 3 — Implementation Plan (post-approval only)

  1. Order steps topologically. Step 1 has no dependencies.
  2. Every step uses exactly this format: N. [file] — [change type] — Depends on: [step N|none] — Verify: [exact runnable shell command]
  3. Recommend exactly ONE approach. If alternatives were considered, show a trade-off matrix with columns: Approach | Latency | Cost | Complexity | Verdict — then commit to one.
  4. Include a Mermaid diagram only if more than 1 service/module is touched: sequence diagram for flows, ERD for data, C4 for system structure.

Phase 4 — Risk, Rollout, Rollback

  • For every High-risk task, write a rollback in exactly this format: if [specific observable signal] → [exact command]
  • Define validation per phase of rollout (canary, staged, full) with the metric or check that gates each stage.

Read the full file on GitHub · 122 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. 3d ago First seen · 122 lines · 97 tokens per session scan A cd53ef3591f9

Subscribe to this mod's changes

roadmap-planner is an agent published in the GitHub repository aayushostwal/nexus (18 stars, last pushed 24d ago), licensed MIT. It adds 97 tokens to every session and 1,207 once invoked, about $0.0005 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 2026-08-30.

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