modernize-map previously rendered the call graph and data lineage as static Mermaid diagrams, which become unreadable once a node has ~10+ edges — exactly the shape of real legacy systems. It now builds an interactive viewer from a shipped template (assets/topology-viewer.html): a zoomable circle-pack of domains/modules sized by LOC, rendered to canvas with level-of-detail reveal, dependency edges with per-kind toggles, search with fly-to, a per-node detail sidebar, and a flow walkthrough mode. Small domain-level .mmd exports remain for docs. - topology.json now has a documented schema (hierarchy + edges + entry points + observations + flows) consumed by the viewer - map traces 2-4 business flows anchored to personas (claimant, operator, auditor), each step in plain business language mapped to the modules that implement it; the viewer plays them as numbered paths - brief gains a Business Walkthroughs section connecting each persona flow to the phase that replaces it - new modernize-preflight command: detects the stack, checks analysis tooling, smoke-compiles a real source file with the legacy toolchain, inventories missing copybooks/descriptors/binary-only artifacts, and writes a per-command readiness verdict - transform now verifies legacy + target toolchains before its plan gate instead of failing at test time - README: commands updated, optional-tooling section reframed as 'what to give Claude'
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| description | argument-hint |
|---|---|
| Generate a phased Modernization Brief — the approved plan that transformation agents will execute against | <system-dir> [target-stack] |
Synthesize everything in analysis/$1/ into a Modernization Brief — the
single document a steering committee approves and engineering executes.
Target stack: $2 (if blank, recommend one based on the assessment findings).
Read analysis/$1/ASSESSMENT.md, analysis/$1/TOPOLOGY.html (and the .mmd
files alongside it), and analysis/$1/BUSINESS_RULES.md first. If any are
missing, say so and stop — they come from /modernize-assess, /modernize-map,
and /modernize-extract-rules respectively. Run those first.
The Brief
Write analysis/$1/MODERNIZATION_BRIEF.md:
1. Objective
One paragraph: from what, to what, why now.
2. Target Architecture
Mermaid C4 Container diagram of the end state. Name every service, data store, and integration. Below it, a table mapping legacy component → target component(s).
3. Phased Sequence
Break the work into 3-6 phases using strangler-fig ordering — lowest-risk, fewest-dependencies first. For each phase:
- Scope (which legacy modules, which target services)
- Entry criteria (what must be true to start)
- Exit criteria (what tests/metrics prove it's done)
- Estimated effort (person-weeks, derived from COCOMO + complexity data)
- Risk level + top 2 risks + mitigation
Render the phases as a Mermaid gantt chart.
4. Business Walkthroughs
For each persona flow in analysis/$1/topology.json (flows — produced
by /modernize-map), a short narrative table: persona, what happens in
business language, which legacy modules implement it today, and which
phase from §3 replaces each. This is the section non-technical approvers
actually read — it connects "Phase 2" to "what happens when a customer
files a claim". If topology.json has no flows, derive 2–3 walkthroughs
from the entry points and say they need SME confirmation.
5. Behavior Contract
List the P0 rules from BUSINESS_RULES.md (the ones tagged Priority: P0 —
money, regulatory, data integrity) that MUST be proven equivalent before any
phase ships. These become the regression suite. Flag any P0 rule with
Confidence < High as a blocker requiring SME confirmation before its phase
starts.
6. Validation Strategy
State which combination applies: characterization tests, contract tests, parallel-run / dual-execution diff, property-based tests, manual UAT. Justify per phase.
7. Open Questions
Anything requiring human/SME decision before Phase 1 starts. Each as a checkbox the approver must tick.
8. Approval Block
Approved by: ________________ Date: __________
Approval covers: Phase 1 only | Full plan
Present
Enter plan mode and present a summary of the brief. Do NOT proceed to any transformation until the user explicitly approves. This gate is the human-in-the-loop control point.