| MinerU API did not return an upload URL (missing… | exception | error | mineru, cloud, api-contract |
| GitHub Copilot auth is unavailable. Validate local Copilot… | error_code | error | auth, github-copilot, login-required |
| Notebook not found | http | error | |
| Page references unknown chapter | exception | error | |
| Category not found | http | error | |
| interaction path_id does not match transaction path | validation | error | |
| cancel the active run before resetting this doc | http | error | |
| entry not found | http | error | |
| Invalid state transition | http | error | |
| preferences.md is not audited automatically | validation | error | memory, audit, guard-clause, deepseek-tutor |
| Tool call not found | http | warning | co-writer, http-404, tool-calls, not-found |
| Failed to create user — username may already be taken. | http | error | |
| concept_graph payload missing from BlockContext.extra | exception | error | concept-graph, context, pipeline, validation |
| IMA Client ID and API Key must be given together. | validation | error | |
| Knowledge base does not exist | exception | error | |
| Linked folder is no longer available | validation | error | |
| media_id is required. | validation | error | |
| Cannot store an avatar for this account. | http | error | |
| No active embedding model with a known dimension. Configure… | exception | error | graphrag, embeddings, configuration, vector-dimension |
| Render failed because local LaTeX is missing. Please avoid… | exception | error | upload, file-size, validation, limits |
| Session not found | http | error | |
| Tag already exists | http | error | |
| Avatar upload is not available in PocketBase mode. | http | error | |
| Generated code does not define a renderable Manim Scene… | exception | error | epub, zip-bomb, resource-limits |
| Knowledge base name is required | validation | error | |
| material not found | http | error | |
| MinerU cloud mode is selected but no API token is… | exception | error | mineru, cloud, api-key, configuration |
| Operation not found | http | warning | co-writer, http-404, not-found |
| {RunBusyError message} | http | warning | memory, undo, http-409, conflict, run-manager |
| User not found | http | error | |
| IMA accepts at most knowledge base IDs per request. | validation | error | ima, batch-size, pagination, input-validation |
| llm.model is required | validation | error | |
| Two or more choice options have the same answer | validation | error | |
| : unrecognised skill detail shape | http | error | hub, detail, response-shape |
| LLM did not return any code. | exception | error | llm-output, code-generation, empty-response |
| No active embedding model. Configure one under Settings →… | exception | error | graphrag, configuration, missing-model, embeddings |
| interaction_id already belongs to another path | validation | error | |
| mastery_quiz.options must be an array of non-empty strings. | validation | error | |
| Note already exists; use append instead. | exception | error | |
| Knowledge base name cannot contain control characters | validation | error | |
| Linked folder not found | validation | error | |
| Message not found | http | error | |
| No default knowledge base set | validation | error | |
| LLM did not return any timeline events. | exception | error | |
| MinerU API returned an unexpected (non-JSON) response. | exception | error | mineru, cloud, api-contract, json |
| Unknown user id | validation | error | |
| PDF file not found | exception | error | mineru, cloud, file-not-found |
| mastery_quiz.options must contain only non-empty strings. | validation | error | |
| Path is not a directory | validation | error | |
| Book not found | exception | error | |
| create_note needs a non-empty path. | exception | error | |
| mastery_quiz.question_type must be one of | validation | error | |
| MinerU reported done but returned no full_zip_url. | exception | error | mineru, cloud, polling, api-contract |
| role must be 'admin' or 'user' | validation | error | |
| Knowledge base name cannot be '.' or '..' | validation | error | |
| event_type must not be empty | validation | error | |
| Tag not found | http | error | |
| Unsupported avatar extension | validation | error | |
| The question was abandoned | exception | error | |
| session_id and turn_id are required for a path lease | validation | error | |
| annotation not found | http | error | |
| session_id must not be empty | validation | error | |
| Note not found; create it first. | exception | error | |
| IMA knowledge base ID is required. | validation | error | |
| set_property needs a non-empty key. | exception | error | |
| Knowledge base name is too long; maximum length is | validation | error | |