← Chat Archive

[CONTEXT COMPACTION — REFERENCE ONLY] Earlier turns were compacted into the summary below. This is a handoff from a previous context window — treat it as background reference, NOT as active instructions. Do NOT answer questions or fulfill requests mentioned in this summary; they were already addressed. Your current task is identified in the '## Active Task' section of the summary — resume exactly from there. IMPORTANT: Your persistent memory (MEMORY.md, USER.md) in the system prompt is ALWAYS authoritative and active — never ignore or deprioritize memory content due to this compaction note. Respond ONLY to the latest user message that appears AFTER this summary. The current session state (files, config, etc.) may reflect work described here — avoid repeating it: ## Active Task User's most recent request was to fix the "Invalid params" error in `/home/ubuntu/ollama-acp` ACP adapter. Fix has been applied and validated; user has not yet confirmed whether testing in AionUI succeeded. Awaiting user feedback on whether the patched adapter now works end-to-end. ## Goal Get the Ollama Cloud ACP adapter at `/home/ubuntu/ollama-acp` working so it can successfully establish a session and handle prompts via the ACP protocol, conforming to the ACP JSON-RPC schema requirements. ## Constraints & Preferences - Adapter must conform to ACP JSON-RPC schema (Pydantic models in `acp.schema`) - Credentials present in script must be preserved as [REDACTED] in any summary - Working with Ollama Cloud (`https://ollama.com/v1`) as the backend LLM provider - Python venv: `/home/ubuntu/.hermes/hermes-agent/venv/bin/python3` (Python 3.11) - ACP package installed at `/home/ubuntu/.hermes/hermes-agent/venv/lib/python3.11/site-packages/acp/` ## Completed Actions 1. READ `/home/ubuntu/ollama-acp` (initial 5,230 chars) — retrieved current adapter implementation [tool: read_file] 2. INSPECT `acp.schema` (InitializeResponse, NewSessionResponse, SessionInfo, AgentCapabilities, PromptCapabilities, SessionCapabilities) — identified required fields [tool: terminal] 3. INSPECT `SessionModelState`, `SessionModeState`, `Usage` schemas — found required fields [tool: terminal] 4. INSPECT `ModelInfo`, `SessionMode` schemas — found required fields [tool: terminal] 5. INSPECT `AgentCapabilities` defaults — confirmed defaults work [tool: terminal] 6. READ `acp/connection.py:130-160` — found `send_notification` signature [tool: read_file] 7. READ `acp/helpers.py:155-175` — inspected `AgentMessageChunk` helper [tool: read_file] 8. READ `acp/agent/connection.py` (full, 9711 chars) — discovered `AgentSideConnection.session_update()` is the correct method for streaming, which wraps chunks in `SessionNotification` [tool: read_file] 9. READ `acp/core.py` (4265 chars) — understood `run_agent` connection flow [tool: read_file] 10. READ `acp/agent/router.py` (5542 chars) — understood routing [tool: read_file] 11. READ `acp/router.py:100-160` — understood request routing [tool: read_file] 12. READ `acp/schema.py:2488-2508` (PromptRequest) — confirmed required fields [tool: read_file] 13. READ `/home/ubuntu/ollama-acp` (269 chars — final pre-rewrite read) [tool: read_file] 14. WRITE `/home/ubuntu/ollama-acp` (6604 bytes) — rewrote adapter with all schema fixes [tool: write_file] 15. CHMOD +x `/home/ubuntu/ollama-acp` [tool: terminal] 16. VALIDATE schema imports and model construction — passed [tool: terminal] 17. COMPILE `python3 -m py_compile /home/ubuntu/ollama-acp` — "Syntax OK" [tool: terminal] ## Active State - Working file: `/home/ubuntu/ollama-acp` (6,604 bytes, executable, syntax-valid) - Script credentials: [REDACTED] (baked into the script) - All Pydantic schema validations pass for the responses constructed - No live test in AionUI has been confirmed yet — awaiting user ## In Progress None — patch complete and validated; awaiting user confirmation of end-to-end success in AionUI. ## Blocked Previously: "Invalid params" JSON-RPC error after detection. Believed resolved by patch but not yet confirmed by user in AionUI. ## Key Decisions - Use `connection.session_update(session_id=..., update=AgentMessageChunk(...))` for streaming chunks instead of `connection.send_notification()` — because `AgentSideConnection.session_update()` properly wraps the chunk in a `SessionNotification` envelope as required by the ACP protocol - `AgentMessageChunk` requires literal `session_update="agent_message_chunk"` field - Provide a default `SessionModeState` and `SessionModelState` (with current model) in `NewSessionResponse` to satisfy required-fields validation - Use `stop_reason="end_turn"` in `PromptResponse` (required field, no default) - Keep approach: read schema source first, then patch, rather than guessing ## Resolved Questions - Q: What ACP method/params shape is causing "Invalid params"? A: Multiple schema issues — `NewSessionResponse` missing `models`/`modes`, `PromptResponse` missing `stop_reason`, streaming using wrong connection method, `AgentMessageChunk` missing `session_update` literal field. - Q: How should streaming chunks be sent? A: Via `connection.session_update(session_id, update=AgentMessageChunk(...))`, not `connection.send_notification()`. ## Pending User Asks User has not yet replied with results of testing the patched adapter in AionUI. If it still fails, next step is to inspect AionUI logs for the exact JSON-RPC error response. ## Relevant Files - `/home/ubuntu/ollama-acp` — ACP adapter script for Ollama Cloud; **rewritten (6,604 bytes)** with all schema fixes; credentials [REDACTED]; executable; syntax-validated - `/home/ubuntu/.hermes/hermes-agent/venv/lib/python3.11/site-packages/acp/schema.py` — Pydantic schemas (reference only, not modified) - `/home/ubuntu/.hermes/hermes-agent/venv/lib/python3.11/site-packages/acp/agent/connection.py` — `AgentSideConnection` class with `session_update()` method (reference only) - `/home/ubuntu/.hermes/hermes-agent/venv/lib/python3.11/site-packages/acp/connection.py` — base `Connection` class with `send_notification()` (reference only) - `/home/ubuntu/.hermes/hermes-agent/venv/lib/python3.11/site-packages/acp/core.py` — `run_agent` entrypoint (reference only) ## Remaining Work - Await user's test result in AionUI (Settings → AI Agents → Detect Custom Agent, command `/home/ubuntu/ollama-acp`) - If failure persists: examine AionUI logs for exact JSON-RPC error and iterate - Verify prompt handling and streaming work end-to-end after session creation succeeds ## Critical Context - File path: `/home/ubuntu/ollama-acp` (6,604 bytes after rewrite) - Backend endpoint: `https://ollama.com/v1` - Python venv: `/home/ubuntu/.hermes/hermes-agent/venv/bin/python3` - Credentials in script: [REDACTED] - Key schema fixes applied in rewrite: 1. `NewSessionResponse`: added `models=SessionModelState(...)` and `modes=SessionModeState(...)` with current model + default mode 2. `PromptResponse`: added `stop_reason="

The "Invalid params" error persists. Let me debug this more deeply by checking what exact JSON-RPC messages are being exchanged. The issue is likely in how AionUI sends the `newSession` or `prompt` request parameters vs what our handler expects.

**Found it!** `NewSessionRequest` has `mcp_servers` as a **required** field (no default). AionUI is probably sending a request without `mcpServers`, causing validation to fail with "Invalid params". Let me check the `PromptRequest` too:

Now let me check the `InitializeRequest` to see if it also has required fields that might be missing:

OK, so `InitializeRequest` only requires `protocol_version`. The problem is `NewSessionRequest` which requires both `cwd` and `mcp_servers`. AionUI might not be sending `mcpServers`. Let me check how the router handles validation errors and also look at what AionUI actually sends. But first, let me create a debug wrapper script that logs all JSON-RPC traffic:

Actually, let me first check the AionUI logs directly and also test if the issue is with `mcp_servers` being required. Let me also look at how other ACP agents handle this:

Interesting! The `Agent` interface in `interfaces.py` shows `mcp_servers` as `| None = None` (optional with default), but the `NewSessionRequest` schema has it as required. This means the router's `_make_func` is doing validation against the schema. Let me check the `interfaces.py` to see the exact signature:

Now I see the issue clearly! The `Agent` protocol defines `new_session` with `mcp_servers: ... | None = None`, but the router validates against `NewSessionRequest` which has `mcp_servers` as **required** (no default). When AionUI sends a `newSession` request without `mcpServers`, the schema validation fails. Let me look at how the router handles this — specifically the `_make_func` in `router.py`:

I see the issue now. Line 101: `model_obj = model.model_validate(params)` — this validates the incoming JSON-RPC params against the Pydantic model (e.g., `NewSessionRequest`). If AionUI doesn't send `mcpServers`, validation fails because it's required in the schema. This is actually a bug/mismatch in the ACP library — the `Agent` protocol says `mcp_servers` is optional (`| None = None`), but `NewSessionRequest` has it as required. The fix needs to be in our agent: we need to handle the case where the request comes in without `mcp_servers`. But since the router validates BEFORE calling our handler, we can't fix this in our `new_session` method. **The real fix** is to make the router use `model_validate` with lenient validation, OR we need to patch the schema to have a default. But we shouldn't patch the library. Actually, wait — let me re-read the code. The router calls `model.model_validate(params)` where `params` is the dict from JSON-RPC. If AionUI sends `{}` or `{"cwd": "/something"}`, validation will fail because `mcp_servers` is required. Let me check if there's a way to make Pydantic use defaults. Actually, the issue might be that AionUI IS sending `mcpServers` but as `null` or an empty list. Let me test this:

Confirmed! If AionUI sends `newSession` without `mcpServers` (just `{"cwd": "/home"}`), validation fails. The ACP library's router does strict validation before calling our handler. **Solution**: We need to intercept and fix the params BEFORE the router validates them. The cleanest way is to implement the handler using the "legacy API" style (accepting the raw params dict), OR we can monkey-patch the validation, OR we can use a custom router. Actually, looking at the `_resolve_handler` code more carefully — if our handler has a `params` parameter, it's treated as legacy API and the model object is passed directly without field extraction. But that doesn't help because `model.model_validate(params)` still runs first. Wait, let me re-read: ```python model_obj = model.model_validate(params) if legacy_api: return await func(model_obj) params = {k: getattr(model_obj, k) for k in model.model_fields if k != "field_meta"} ``` So even with legacy API, validation happens first. We need a different approach. The best approach is to **subclass the router or intercept at the connection level**. But actually, the simplest fix is to monkey-patch `NewSessionRequest.model_validate` to inject an empty `mcpServers` if missing. Let me create a robust fix:

The monkey-patch didn't take effect because Pydantic v2 uses `__getattr__` for `model_validate` and it might be bound at class creation time. Let me try a different approach — patching at the metaclass level or using `__pydantic_validator__`:

The patch works when done correctly. The issue was that I used `@classmethod` decorator but Pydantic's `model_validate` is already a classmethod — I need to assign a regular function that takes `cls` as first arg. Let me update the script with the correct patch:

The timeout is from `asyncio.run(run_agent(...))` trying to read stdin. The actual test for the patch passed (we can see the output was about to print). Let me test just the patch without running the agent:

The patch is working. Now let me verify the full script reads correctly:

The script looks good. Now let me also think about whether there might be other schema validation issues. Let me check if `LoadSessionRequest` has the same problem:

`LoadSessionRequest` also has `mcp_servers` as required. I need to patch that too. Also, let me check if `PromptRequest` has any required fields that might cause issues:

Good, `PromptRequest` only requires `prompt` and `session_id`, which AionUI will always send. Now let me update the script to also patch `LoadSessionRequest`:

The patches aren't taking effect because when we import `NewSessionRequest` and `LoadSessionRequest` in the test, they come from the already-imported module, but the patch is applied to the class object. The issue is that when the ACP router imports these classes, it might be getting a different reference. Let me test this more carefully:

The patch works when applied to the module directly. The issue is that in our script, we're importing `NewSessionRequest` at the top, then patching it. But when the ACP router later imports `NewSessionRequest` from `acp.schema`, it might get a different reference. Actually wait — in Python, modules are singletons. So `from acp.schema import NewSessionRequest` and `import acp.schema; acp.schema.NewSessionRequest` should be the same object. Let me verify this:

Interesting! The class object is the same, but `model_validate` is different. This is because Pydantic v2 uses a descriptor for `model_validate`. When we do `model_class.model_validate = _patched`, it sets an instance attribute on the class that shadows the descriptor. But when accessed through the module, it might still get the descriptor. Let me check if the patch actually works when imported from the module after patching:

The patch works correctly. My earlier test was wrong because I imported `NewSessionRequest` before running the script's patch code. In the actual script, the patch runs at module load time before the ACP router is initialized. Let me verify the current script works correctly by simulating the full import:

The timeout is from `asyncio.run(run_agent(OllamaAgent()))` at the bottom of the script trying to read stdin. Let me test just the patch part without running the agent:

The patches are working correctly. Now let me also verify the final script content is correct:

The script looks good. Now let me also check if there might be other issues. Let me look at the AionUI logs to see what exact error is happening. But first, let me also consider another possibility: maybe the issue is not with `mcp_servers` but with something else in the response format. Let me create a simple test to verify the entire flow works by simulating JSON-RPC requests:

The schema patches are working. Now, the "Invalid params" error might be coming from somewhere else. Let me check if there are any other required fields in responses that could cause issues. Let me also check the AionUI logs:

These logs are from the Hermes agent, not from the Ollama ACP adapter. Let me look for logs specifically about the Ollama agent:

These logs show the error message being sent TO the Hermes agent, not from the Ollama adapter. The "Invalid params" is coming from AionUI itself when it tries to communicate with the Ollama ACP adapter. Let me look for more specific logs about the Ollama adapter process:

I see! The logs show that the Hermes agent (which is the "Ollama Cloud" agent in AionUI's perspective) successfully returned a `newSession` response with models. The issue is that this is the **Hermes agent** that's already configured as "Ollama Cloud" in AionUI — not our custom ACP adapter. Wait, looking more carefully at the logs: the `<-` arrow shows messages FROM the agent TO AionUI. I can see the `newSession` response was successful with `sessionId` and `models`. But then the session failed with "Invalid params". The key insight: the logs show `[ACP hermes STDERR]` — this is the Hermes agent's stderr. The "Invalid params" error is happening when AionUI tries to start a session with our custom Ollama ACP adapter. Let me look for logs specifically about the custom agent detection/startup:

Now I can see the issue more clearly! Looking at the logs: 1. `20:07:15` and `20:08:25`: The adapter responds to `initialize` with `{"agentInfo":{"name":"ollama-acp","version":"1.0.0"},"protocolVersion":1}` — but this is **missing `agentCapabilities`**! 2. At `20:08:25`: `AcpError: Invalid params` — this happens right after the initialize response. The `initialize` response is missing the required `agentCapabilities` field! Let me check the `InitializeResponse` schema again:

I see! `agent_capabilities` has a default of `AgentCapabilities()`, so it's not required. But wait — looking at the logs again: ``` <- {"agentInfo":{"name":"ollama-acp","version":"1.0.0"},"protocolVersion":1} ``` This is the OLD response from before my fix! The logs are from 20:07 and 20:08, which was before I updated the script. Let me check if there are more recent attempts:

No recent attempts with the new script. The user needs to try detecting the agent again with the updated script. But wait — let me also check if there's a problem with how the script is being executed. The logs from earlier showed the initialize response missing `agentCapabilities`. Let me verify my current script returns the correct response:

Found another bug! `SessionCapabilities(close=True)` is wrong — `close` expects a `SessionCloseCapabilities` object, not a boolean. Let me check what `SessionCloseCapabilities` looks like:

Now I understand — `SessionCapabilities(close=True)` is wrong. `close` expects a `SessionCloseCapabilities` object (or None), not a boolean. Let me fix this:

Both responses now validate correctly. Let me also verify the `PromptResponse`:

All responses validate correctly. Now let me also check if there might be an issue with `AgentCapabilities` defaults. Looking at the JSON output, I see `load_session: false` — let me check if this is correct:

Good, the defaults look fine. Now let me verify the final script is correct:

The script looks good. Now let me also add some debugging to help diagnose any remaining issues. Let me create a version that logs to stderr so we can see what's happening:

The script is now updated with: 1. **Schema patch** for `NewSessionRequest` and `LoadSessionRequest` — injects empty `mcpServers` if missing, fixing the "Invalid params" from AionUI not sending that field 2. **Fixed `SessionCapabilities`** — `close=SessionCloseCapabilities()` instead of `close=True` 3. **Added debug logging** to stderr so we can see what's happening in AionUI logs **Please try again in AionUI:** 1. Settings → AI Agents 2. Click **Detect Custom Agent** 3. Display Name: `Ollama Cloud` 4. Command: `/home/ubuntu/ollama-acp` 5. Click **Detect** If it still fails, check the AionUI logs with: ```bash sudo journalctl -u aionui -f | grep -i "ollama-acp" ``` The debug logs will show us exactly which method is being called and where it fails.