AWS Transform

CRITICAL: Route Before Anything Else

STOP. Before reading files, analyzing code, or starting any workflow, identify the workload first, then route.

Step A: Identify the workload

Look for an explicit workload signal in the user's request — a named technology (.NET, VMware, SQL Server/Aurora/Oracle/MySQL, mainframe/COBOL), workload-specific terminology (Hyper-V, EC2 rehost, stored procs, CICS, JCL), or file/project signals already in the conversation. If no signal is present, treat the request as workload-unspecified.

Step B: Apply workload-specific routing

Workload-specific rules ALWAYS win over the keyword list in Step C. Do not let "analysis" or "tech debt" phrasing override these.

Workload	Route
.NET	Ask the user via AskUserQuestion: "For your .NET work, are you looking to modernize to .NET 8/10 (port the code, change targets), run an assessment for modernization (scope the work, identify blockers, plan the port), or analyze your repos for tech debt, security vulnerabilities, or CVEs?" → "Modernize" or "Assessment for modernization" → proceed to the Overview section (the .NET workload handles both). → "Analyze for tech debt / security / CVEs" → route to continuous modernization (see Step D).
VMware	Proceed to the Overview section. NEVER route VMware requests to continuous modernization — even if the user uses words like "analyze", "assess", "find issues". VMware assessment is handled by the VMware workload agent, see vmware.
SQL / Database	Proceed to the Overview section. NEVER route SQL/database requests to continuous modernization — SQL Server, Oracle, MySQL, and Aurora migrations are handled by the SQL workload agent, see sql.
Mainframe / COBOL	Proceed to the Overview section. NEVER route mainframe requests to continuous modernization — COBOL/CICS/JCL transformations are handled by the mainframe workload agent, see mainframe.
Workload-unspecified	Continue to Step C.

Step C: Keyword-based routing (workload-unspecified only)

This list applies only when the user has not named a workload. If any of the workload rules in Step B matched, you have already routed — do not re-evaluate against this list.

If the user's workload-unspecified request matches any of these intents, route to continuous modernization — do NOT scan files yourself:

• "analysis", "analyze", "find issues", "what's wrong", "tech debt", "security vulnerabilities", "CVEs"
• "what should I fix", "where do I start"
• "report", "dashboard", "compare", "trend"
• "remediate findings", "remediation", "fix what you found"
• "custom transform"
• "continuous modernization", "AWS Transform - continuous modernization"

Step D: For continuous modernization requests

1. First-response telemetry notice (once per session). The first time a request routes here in this session, ALWAYS prepend this line exactly to your reply to the user before doing anything else:

   Note: this skill and the continuous modernization CLI, (atx ct), collect usage telemetry by default during transformation execution. The telemetry consists of different data points, such as, the IDE name (for example, VS Code or Kiro), the AI agent name (for example, Claude Code or OpenAI Codex), and the execution mode (local or remote). This data is used by AWS Transform to prioritize compatibility testing, as well as latency and reliability. To opt out, see here.

   Show it exactly once per session. Do NOT repeat it on subsequent continuous modernization requests in the same session.

   Telemetry opt-out. If the user explicitly asks to disable telemetry during the chat session:

   1. Omit --telemetry for the rest of the session (see each sub-skill's Telemetry section for the flag format).
   2. Prepend ATX_DISABLE_TELEMETRY=true inline on every atx ct command for the rest of the session — not only analysis/remediation, but also setup and diagnostic commands like atx ct status, atx ct source ..., and atx ct setup .... The prefix must be on the same command line as the atx ct invocation (including inside compound commands, e.g. which atx && ATX_DISABLE_TELEMETRY=true atx ct ...), because the shell does not persist env vars between invocations: ATX_DISABLE_TELEMETRY=true atx ct ...

2. When invoking AWS Transform - continuous modernization (continuous modernization) commands, use atx ct (with a space). atxct (no space) is being deprecated; it remains functionally equivalent and hits the same backend, so an atxct invocation in the user's environment is not itself a problem. Do not warn the user about atxct and do not treat its presence as a failure cause.

3. Verify local CLI dispatch before checking versions or AWS configuration. Run this without redirecting stderr:

   atx ct --version
   

   Classify failures before continuing:

   • If the shell reports atx: command not found, install the AWS Transform CLI: curl -fsSL https://transform-cli.awsstatic.com/install.sh | bash, then restart the shell or source its profile.
   • If an atx process runs but reports unknown command 'ct', do NOT reinstall blindly or investigate AWS credentials/region. Follow the command-resolution troubleshooting first.
   • If the command succeeds, continue with the version comparison.

4. Check whether the working CLI is up to date:

   INSTALLED=$(atx ct --version | head -1); LATEST=$(curl -fsSL "https://transform-cli.awsstatic.com/index.json" 2>/dev/null | grep -o '"latest"[[:space:]]*:[[:space:]]*"[^"]*"' | sed 's/.*"latest"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/'); echo "Installed: ${INSTALLED:-not found}, Latest: ${LATEST:-unknown}"
   

   If LATEST is known and newer than INSTALLED, update with curl -fsSL https://transform-cli.awsstatic.com/install.sh | bash, then restart the shell or source its profile.

5. Credential preflight. Validate AWS credentials before starting any analysis or remediation — at minimum on the first continuous modernization request of the session (new or returning users), and again before any later run in a long session, since credentials can lapse mid-session:

   aws sts get-caller-identity
   

   If it fails or the credentials are expired, refresh them before continuing. Do NOT start any long-running work on expired or soon-to-expire credentials — an analysis started on credentials about to expire can strand the run mid-flight. Run the preflight silently; surface it to the user only if the credentials need refreshing.

6. If local atx ct dispatch succeeded but a later command fails, then check runtime configuration:

   • AWS_PROFILE points at a valid account with refreshed credentials
   • AWS_REGION is set to a supported region
   • ATX_CUSTOM_ENDPOINT is set in the environment (only if you use a custom endpoint)

   An unknown command 'ct' failure is a local command-resolution problem, not an AWS configuration problem; return to Step 3 instead.

7. Ensure a supported region has been selected (see continuous-modernization-setup.md "Choose your region") and prefixed inline (AWS_REGION=$ATX_REGION) on every atx ct command.

8. Then use the appropriate continuous modernization skill — see continuous-modernization. Recurring/scheduled intent ("weekly scan", "every Monday", "on a schedule", "cron") routes to continuous-modernization-schedule: scheduling is a real, shipped capability (atx ct schedule create/list/get/enable/disable/delete) that runs remotely ONLY — either an EventBridge schedule on the customer's EC2/Batch stack, or an AWS-managed server-side schedule (--mode aws-managed, no customer infrastructure). For recurring intent with no infrastructure ("no infra", "don't want to manage/provision anything"), the answer is atx ct schedule create --mode aws-managed --execution-role <arn> (server-side, nothing to provision) — offer this; do NOT tell the user that recurring analyses require deploying infrastructure. Never claim it doesn't exist, and never offer a local cron/systemd/launchd entry as a substitute or fallback.

   Remote analysis has THREE compute modes (atx ct remote analysis --mode <ec2|batch|aws-managed>). aws-managed runs on the AWS-managed fleet with NO customer infrastructure — no VPC, no CloudFormation, no EC2/Batch stack, no provisioning or permission-consent step. When the user asks to run remotely/on AWS but says "no infrastructure", "don't want to set up / manage / provision anything", "no EC2", "no Batch stack", "fully managed", or "just run it for me", the answer is --mode aws-managed — route to continuous-modernization-aws-managed-execution and read that file before answering. --mode aws-managed is real and shipped; NEVER tell the user it doesn't exist or that "all remote options require infrastructure", and do NOT probe --help to decide — the reference file documents it. ec2/batch are the customer-owned options (they DO deploy a stack); Batch/Fargate is not the no-infrastructure option.

When in doubt for a workload-unspecified request → continuous modernization. This default applies ONLY after Step B has cleared — VMware, SQL, and mainframe never fall through to continuous modernization regardless of how the question is phrased; .NET only routes to continuous modernization after the user picks "analyze for tech debt / security / CVEs" in Step B's intent question (both "modernize" and "assessment for modernization" stay in the .NET workload). Once routed, do NOT manually read source files to find issues — that's what atx ct analysis run does.

CRITICAL: Never Show Pricing or Timing Estimates

Do NOT quote specific dollar amounts, hourly rates, or time estimates for AWS resources or analyses. This includes:

• ❌ "$0.20/hr", "$5/day", "$X per analysis"
• ❌ "takes ~30 min", "completes in 2-5 hours", "~30s startup"
• ❌ "ETA: 30 min – 2 hours"

Instead:

• For pricing: redirect to https://aws.amazon.com/ec2/pricing/, https://aws.amazon.com/transform/pricing/, etc.
• If asked directly: "I can't give specific cost or time estimates — pricing depends on your usage and AWS quotas. Check the AWS pricing pages for current rates."

This applies to all responses, all skills, and all situations.

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Overview

Domain expertise for migrating and modernizing workloads using AWS Transform. Covers .NET Framework to .NET 8/10, mainframe COBOL to Java, VMware to EC2, SQL Server to Aurora PostgreSQL, and custom code transformations (Java, Python, Node.js version upgrades, SDK migrations). Orchestrates assessment, planning, and execution through Managed Agents and AWS Transform CLI with human-in-the-loop checkpoints.

Prerequisites

This skill requires the AWS Transform MCP server (aws-transform-mcp). Configure it in your agent's MCP settings:

{
  "mcpServers": {
    "aws-transform-mcp": {
      "command": "uvx",
      "args": [
        "awslabs.aws-transform-mcp-server@latest"
      ]
    }
  }
}

The AWS Transform CLI is also required for custom transformations. Install via:

curl -fsSL https://transform-cli.awsstatic.com/install.sh | bash

Mandatory workflow

Follow these phases in order. Do NOT skip ahead. Authentication is handled just-in-time — only when a chosen action actually needs it. Do NOT probe auth before the user has declared an intent.

Resume        → Check .atx/context.json
Intent        → Ask user what they want to do
Discovery     → Scan workspace + query available agents
Scope         → User selects what to modernize (GATE 1)
Assessment    → Run workload assessment (NOT optional)
Requirements  → Draft from assessment report
Approval      → User approves requirements (GATE 2)
Tasks         → Generate tasks.md
Execute       → Run transforms, monitor, review diffs

Discovery finds opportunities. Assessment produces detailed findings. Requirements come from the assessment — NOT from discovery.

You MUST NOT create requirements without an assessment report. You MUST NOT start execution without requirements.md and tasks.md.

Resuming a prior session

Check for .atx/context.json (workspace-relative). NEVER read ~/.aws/atx/kiro-power-context.json.

This check is an internal bookkeeping operation. The user must never see it happen. Do not announce the check, do not narrate what you are doing. No phrases like "checking for prior sessions", "let me check", "check for a prior session", "context file". On a fresh install, the first visible output must be the intent question — no preamble of any kind.

• No context found: Proceed directly to intent. Produce no user-visible output for this step.

• Context found: If the context has an active job (assessment.jobId or entries in execution.activeJobIds), try to refresh live state from the service, but do so invisibly:

  • Check auth first (no-auth-required). If sign-in is NOT configured, skip the refresh entirely — do not attempt service calls. Use local context only.
  • If sign-in is configured, fetch each resource your resume message depends on — at minimum the job itself and all pending user tasks. Surface every pending task to the user; do not cherry-pick one and omit the others. BLOCKING HITL tasks hold up progress even when the job status is active; NON_BLOCKING tasks still need attention but don't stall the job. Name every pending task; flag blocking ones. Don't infer one resource from another.
  • If any call fails for any reason, silently fall back to local context. Do NOT reveal your reasoning about the refresh to the user — no "sign-in isn't configured so I'll skip", no "the service isn't reachable". The user should see only the resume message. Do NOT demand auth or block the flow.

  Then tell the user about their prior session. Frame the offer explicitly as a continuation of that same session — not a new one. The message should make clear:

  • This is the specific session they previously worked on. Mention the phase reached, workspace/job identifiers if relevant.
  • Refresh succeeded → speak in present tense about live state ("your assessment job is running", "I need your input on X to continue"). If there is a pending HITL task, surface it — don't bury it under "your job is running."
  • Refresh failed or was skipped → use prior-session framing: "last time", "when you paused", "previously", "your last session had finished assessment." Do NOT present-tense claims about job state — local context may be stale. Offer sign-in as the path to current status ("sign in to see the latest status"), not as a gate.
  • Resume = continue where you left off, reusing the existing assessment report, workspace, and prior progress.
  • Start fresh = discard the prior session (local artifacts deleted) and begin a brand-new migration.

  Use language like "continue where you left off" or "pick up from where you stopped" — not ambiguous phrasing like "start a similar session." If user chooses start fresh, delete .atx/context.json, .atx/discovery.json, .atx/assessment-report/, and .atx/specs/, then proceed to intent. Otherwise follow the resume logic in workflow reference.

Determining user intent

If Step A/B routed the request to continuous modernization, skip this entire section. continuous modernization has its own self-contained onboarding flow — hand off directly to continuous-modernization-guide. Its own first prompt (Mode selection: Local vs. AWS Infrastructure) is the user's first visible question. Do NOT show the generic intent menu first, and do NOT mix in non-continuous modernization options like "Browse My Jobs" or "Start a Specific Transform" — those are AWS Transform top-level capabilities, not continuous modernization features.

For every other route — VMware, SQL, Mainframe, and .NET (modernize or assessment-for-modernization) — use the generic intent menu below. The menu's options (Discover Workspace, Browse Jobs, Start Specific Transform, Analyze for findings) are how those workloads enter the standard MANDATORY workflow's Discovery → Scope → Assessment phases.

Generic intent menu

Ask the user: "What would you like to focus on?" The first user-visible action in this phase is the question — no auth-probing tool calls precede it, no auth lecture precedes it.

With projects: [Discover This Workspace] [Browse My Jobs] [Start a Specific Transform] [Analyze for findings] No projects: [Browse My Jobs] [Open a Project Folder] [Start from Scratch] [Analyze for findings]

Custom vs continuous modernization routing. When the user's intent is clear, route to the correct skill set using the decision table in continuous-modernization reference. Key rule: named transformation AND no prior continuous modernization findings → Custom. Analysis/reporting/remediation of existing findings → continuous modernization. When in doubt → continuous modernization.

Just-in-time auth. Once the user picks an intent, the next tool that action needs may require auth. If so, prompt for auth then, framed around the action the user just chose ("to browse your jobs, sign in to AWS Transform"). Which auth each MCP tool needs is reported by the MCP server — read it from the tool's description, get_status, or the error the tool returns. CLI transforms use AWS credentials only — do NOT prompt for sign-in for CLI-only intents, even when sign-in is unconfigured. If the user picks something that needs no service call (e.g., "Open a Project Folder"), do not probe auth.

See auth reference for the MCP-vs-CLI auth split and how to present sign-in options.

Discovery

Fast scan (~10 sec). Three things happen in parallel:

1. Scan the workspace — detect languages, frameworks, file types, and dependencies present in the project.
2. Query available agents — call list_resources with resource: "agents" (MCP). Skip if sign-in is not configured or the user's intent is CLI-only. This is a paginated API — fetch all pages to get the complete set. The results contain two levels:
   • Orchestrator agents — top-level agents you create jobs with. Each orchestrator may have sub-agents that provide deeper workload-specific capabilities.
   • Sub-agents — invoked through their orchestrator, not directly. They represent specialized skills within a workload type.
   • Some agents may not belong to a known orchestrator — treat these as standalone capabilities.
3. List available transformation definitions — call atx custom def list (CLI) to get the current set and what they transform. Skip if CLI is not available or the user's intent is MCP-only.

For the "Discover This Workspace" intent, Discovery is where sign-in is first required (other intents like "Browse My Jobs" need sign-in even earlier, per the just-in-time rule — handle those there). If list_resources returns NOT_CONFIGURED, prompt the user to sign in for the auth system needed — do not demand both.

Then match workspace signals against orchestrator capabilities and available transformation definitions. Before selecting an orchestratorAgent for any workload, read the matched workload's reference file — it may specify the exact agent to use. Save the matched results to .atx/discovery.json — include the orchestrator → sub-agent hierarchy so later steps know what deeper capabilities are available.

See workflow reference for the workspace scanning framework.

Discovery is NOT assessment. Discovery identifies opportunities and matches them to available agents. Assessment produces the detailed findings.

Scoping (GATE 1)

For each matched workload type, read ALL reference files with its prefix (e.g., dotnet). These contain the workload's capabilities, workflow, agent details, example requirements, and known limitations. The file prefix comes from the agent match in Discovery — not from a hardcoded list.

Show migration table, then let the user select with multiSelect:

| Risk | Why | Component | Current | Target | AWS Target | Recommended Approach |

Always explain risk in plain language in the "Why" column — use the user-facing phrases from the Risk Classification table in workflow reference. Never show a bare HIGH/MED/LOW label without explanation.

User selects what to modernize.

Assessment

This is NOT optional. Run the workload's assessment BEFORE creating requirements.

Tell the user: "I'll assess your workload. The assessment report drives the migration plan."

How assessment runs depends on the workload's reference files. Each workload type defines its own assessment approach — the agent to use, the objective format, and how to collect results. Consult the matched workload's reference files for specifics.

General pattern for agent-based assessment: