fix(examples): emit EXAMPLE_COST for marketplace demo

[enyst]

Summary

• move the marketplace demo EXAMPLE_COST fix onto its own branch
• keep release PR Release v1.13.0 #2378 limited to the release commit
• apply the previously removed change from 21704dc on top of main

Testing

• not run (branch split / PR management only)

---

Agent Server images for this PR

• GHCR package: https://github.com/OpenHands/agent-sdk/pkgs/container/agent-server

Variants & Base Images

Variant	Architectures	Base Image	Docs / Tags
java	amd64, arm64	eclipse-temurin:17-jdk	Link
python	amd64, arm64	nikolaik/python-nodejs:python3.13-nodejs22	Link
golang	amd64, arm64	golang:1.21-bookworm	Link

Pull (multi-arch manifest)

# Each variant is a multi-arch manifest supporting both amd64 and arm64
docker pull ghcr.io/openhands/agent-server:b737441-python

Run

docker run -it --rm \
  -p 8000:8000 \
  --name agent-server-b737441-python \
  ghcr.io/openhands/agent-server:b737441-python

All tags pushed for this build

ghcr.io/openhands/agent-server:b737441-golang-amd64
ghcr.io/openhands/agent-server:b737441-golang_tag_1.21-bookworm-amd64
ghcr.io/openhands/agent-server:b737441-golang-arm64
ghcr.io/openhands/agent-server:b737441-golang_tag_1.21-bookworm-arm64
ghcr.io/openhands/agent-server:b737441-java-amd64
ghcr.io/openhands/agent-server:b737441-eclipse-temurin_tag_17-jdk-amd64
ghcr.io/openhands/agent-server:b737441-java-arm64
ghcr.io/openhands/agent-server:b737441-eclipse-temurin_tag_17-jdk-arm64
ghcr.io/openhands/agent-server:b737441-python-amd64
ghcr.io/openhands/agent-server:b737441-nikolaik_s_python-nodejs_tag_python3.13-nodejs22-amd64
ghcr.io/openhands/agent-server:b737441-python-arm64
ghcr.io/openhands/agent-server:b737441-nikolaik_s_python-nodejs_tag_python3.13-nodejs22-arm64
ghcr.io/openhands/agent-server:b737441-golang
ghcr.io/openhands/agent-server:b737441-java
ghcr.io/openhands/agent-server:b737441-python

About Multi-Architecture Support

• Each variant tag (e.g., b737441-python) is a multi-arch manifest supporting both amd64 and arm64
• Docker automatically pulls the correct architecture for your platform
• Individual architecture tags (e.g., b737441-python-amd64) are also available if needed

[github-actions]

API breakage checks (Griffe)

Result: Passed

Action log

[github-actions]

Agent server REST API breakage checks (OpenAPI)

Result: Failed

Log excerpt (first 1000 characters)

{"asctime": "2026-03-10 18:31:16,913", "levelname": "WARNING", "name": "openhands.agent_server.config", "filename": "config.py", "lineno": 173, "message": "\u26a0\ufe0f OH_SECRET_KEY was not defined. Secrets will not be persisted between restarts."}
::error title=openhands-agent-server REST API::Breaking REST API change detected without MINOR version bump (1.12.0 -> 1.12.0).

Breaking REST API changes detected compared to baseline release:
- added '#/components/schemas/HookExecutionEvent' to the '/items/anyOf[#/components/schemas/Event]/' response property 'oneOf' list for the response status '200'
- added '#/components/schemas/HookExecutionEvent' to the 'items/items/' response property 'oneOf' list for the response status '200'
- added '#/components/schemas/HookExecutionEvent' to the response body 'oneOf' list for the response status '200'
- the 'file' request property type/format changed from 'string'/'' to 'string'/'binary'
- added the new 'hook' enum value to the '/items/anyOf[#/co

Action log

[all-hands-bot]

🟢 Good taste - Elegant, simple solution

Taste Rating: 🟢

This is a straightforward CI infrastructure fix. The example was missing the required EXAMPLE_COST output that the test workflow expects. The fix:

1. Documents the requirement in AGENTS.md (good - makes it discoverable)
2. Adds the required print statement for a non-LLM example

No complexity, no special cases, just solving the real problem. LGTM!