fix(trpc): default agent to 'claude' in createAutomationSchema for SDK <alpha.10 compat

[sazabi]

Problem

SDK <alpha.10 and callers predating PR #4481 omit the agent field (previously agentConfig) from automation.create requests. Since #4481 deployed the agent text not null DB column and strict Zod schema, these callers receive a BAD_REQUEST ZodError: Invalid input: expected string, received undefined on the agent path.

17 errors observed in production since 2026-05-13 12:32 UTC.

The error pattern:

❌ tRPC error on automation.create: Error [TRPCError]: [{ "expected": "string", "code": "invalid_type", "path": ["agent"], "message": "Invalid input: expected string, received undefined" }]

Fix

Add .default("claude") to the agent field in createAutomationSchema. This makes the field optional on the wire (matching SDK <alpha.10 / CLI <0.2.16 behaviour) while the stored value remains a non-null string — identical to the pre-rename implicit default.

No changes to the DB schema or any other callers.

Testing

• Desktop dialog: guards with !!selectedAgent before submit — unaffected
• CLI v0.2.16+: always sends agent — unaffected
• SDK alpha.10+: always sends agent — unaffected
• SDK <alpha.10 / pre-fix(automations): resolve agent presets live from host instead of snapshot #4481 callers: now silently default to "claude" instead of erroring

Relates to #4481.

---

Summary by cubic

Default agent to "claude" in createAutomationSchema to restore compatibility with older clients that omit the field. This prevents Zod BAD_REQUEST errors on automation.create while keeping the DB value non-null.

• Bug Fixes
  • Set agent default via agentSchema.default("claude").
  • Stops 17 production errors from SDK <alpha.10 / older CLI.
  • No impact on current SDK/CLI; no DB changes.

^{Written for commit d1199a9. Summary will update on new commits.}

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[greptile-apps]

Greptile Summary

This PR applies a targeted backwards-compatibility fix for the automation.create tRPC endpoint, restoring tolerance for callers on SDK <alpha.10 or CLI <0.2.16 that omit the agent field after the agentConfig→agent rename landed in #4481.

• Adds .default(\"claude\") to agentSchema in createAutomationSchema, making agent optional on the wire while the persisted DB column value remains a non-null string.
• No DB schema changes, no other callers affected; the \"claude\" default matches the implicit pre-rename behaviour.

Confidence Score: 5/5

Safe to merge — single-field schema change with no DB impact and a valid, bounded default value.

The change is a one-line addition of .default("claude") to a Zod string field. The default satisfies the existing min(1).max(200) constraints, the persisted column stays non-null, and no other callers or schemas are touched. The fix directly matches the error pattern observed in production logs.

No files require special attention.

Important Files Changed

Filename	Overview
packages/trpc/src/router/automation/schema.ts	Adds .default("claude") to the agent field in createAutomationSchema so SDK <alpha.10 / CLI <0.2.16 callers that omit the field are silently defaulted instead of receiving a Zod validation error.

Sequence Diagram

sequenceDiagram
    participant OldCaller as SDK <alpha.10 / CLI <0.2.16
    participant NewCaller as SDK ≥alpha.10 / CLI ≥0.2.16
    participant tRPC as tRPC automation.create
    participant Zod as createAutomationSchema
    participant DB as Database

    OldCaller->>tRPC: "{ name, prompt } (agent: undefined)"
    tRPC->>Zod: "parse({ name, prompt })"
    Note over Zod: agent: agentSchema.default("claude")<br/>undefined → "claude"
    Zod-->>tRPC: "{ name, prompt, agent: "claude" }"
    tRPC->>DB: "INSERT agent = "claude""

    NewCaller->>tRPC: "{ name, prompt, agent: "claude-opus-4" }"
    tRPC->>Zod: "parse({ name, prompt, agent: "claude-opus-4" })"
    Zod-->>tRPC: "{ name, prompt, agent: "claude-opus-4" }"
    tRPC->>DB: "INSERT agent = "claude-opus-4""

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[github-actions]

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