[LP-GP2-S2] Generate Echo contract-host artifacts for Launchpad intents

[flyingrobots]

Hill

Emit the Launchpad intent/query artifacts Echo needs to host the browser application without hand-copying contract semantics.

Scope

• Reuse existing generic emitter/module seams where possible.
• Keep artifact identity, operation ids, context vars, and observer/query helpers stable.
• Do not place Launchpad product behavior in Wesley core.

Acceptance criteria

• Generated artifacts can be consumed by an Echo-side contract-host test or fixture.
• Operation identity and schema hashes are reproducible.
• Failure cases are deterministic compiler/emitter diagnostics.

Goalpost: flyingrobots-labs/flyingrobots.dev#6
Depends on: flyingrobots/wesley#616
Release bar: flyingrobots-labs/flyingrobots.dev#4

[coderabbitai]

🔗 Related PRs

flyingrobots/wesley#499 - test(stack): add Stack Witness 0001 fixture artifact shape [merged]

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[coderabbitai]

🔗 Related PRs

#326 - Echo contract hosting roadmap [merged]
#329 - Stack Witness 0001 fixture-backed jedit walking skeleton [merged]
#344 - feat(wesley): consume canonical requirements artifacts [merged]
#365 - feat(wesley): emit query observer host helpers [merged]

---

📝 Issue Planner

_{Check the box below or use the @coderabbitai plan command to generate an implementation plan and prompts that you can use with your favorite coding assistant.}

• Create Plan

---

🧪 Issue enrichment is currently in open beta.

You can configure auto-planning by selecting labels in the issue_enrichment configuration.

To disable automatic issue enrichment, add the following to your .coderabbit.yaml:

issue_enrichment:
  auto_enrich:
    enabled: false

💬 Have feedback or questions? Drop into our discord!