ErrLookup › rohitg00/ai-engineering-from-scratch

rohitg00/ai-engineering-from-scratch

Learn it. Build it. Ship it for others. · Python · 810 source files

Analyzed at a56b4b8ad4 on 2026-09-03. 419 documented errors.

Code / Message	Type	Severity	Tags
expected object	validation	error	json, validation, schema, structured-output
invalid type for : expected	validation	error	python, json-schema, type-mismatch, validation
duplicate fixture id	validation	error
size must be positive	validation	error
schema for must be an object	validation	error	python, json-schema, validation, tool-definitions
`-32021` Server requires roots, sampling, and elicitation capabilities for this request	error_code	error	mcp, capabilities, negotiation, elicitation
path escapes sandbox	exception	error
schema type for must be a string or non-empty string list	validation	error	python, json-schema, validation, type-declaration
schema must be a non-negative integer	validation	error	python, json-schema, validation, configuration
unsupported schema type	exception	error	python, json-schema, validation, tool-definitions
legacy probe did not prove the configured legacy era	validation	error
choose one execution boundary for a capability	exception	warning	python, tool-design, mutual-exclusion, validation
response id does not exactly match request id	validation	error
schema enum for must be a non-empty list	validation	error	python, json-schema, enum, validation
Method not found	exception	error	mcp, json-rpc, dispatch, method-routing
`-32022` Unsupported protocol version	error_code	error	mcp, protocol-version, version-mismatch, negotiation
_meta must be an object	validation	error	mcp, metadata, request-validation, json-rpc
uri must be a string	validation	error	mcp, resources, uri, type-validation
_meta. is required	validation	error	mcp, protocol-version, metadata, validation
unknown resource	validation	error	mcp, resources, unknown-uri, lookup
; ".join(errors)	validation	error
path escapes sandbox	exception	error	typescript, sandbox, path-traversal, filesystem
_meta. must include name and version	validation	error	mcp, client-info, metadata, optional-fields
name must be a string	validation	error	mcp, prompts, name, type-validation
server/discover accepts no params beyond _meta	validation	error	mcp, discovery, unknown-fields, validation
invalid JSON-RPC response envelope	validation	error
transport has no scripted response left	exception	error
managed requirements need explicit acceptance of the…	exception	warning	python, runtime-selection, decision-gate, beta-opt-in
canonical collision	validation	error	mcp, name-collision, registry
denied module	exception	error
runtime discovery failed	validation	error
tool result or confirmation must reference a known action	exception	error
malformed line	validation	error
publisher domain must be a valid multi-label DNS name	validation	error
message batches do not provide progressive per-token output	exception	error
Missing variables for	validation	error
unsupported input request	validation	error
server did not return JSON-RPC error	validation	error
unknown post_process rule	validation	error
could not load module spec for	exception	error
Partial indexing not supported in this basic implementation	exception	error
cosine: vector length mismatch	exception	error
response must contain exactly one of result or error	validation	error
unknown predicate	validation	error
Only one dimension can be -1	validation	error
_step requires EXECUTING/REFLECTING, got	exception	error
fixture validation failed	exception	error
horizon undefined: slope w=	exception	error
Inconsistent shapes at index	validation	error
unknown performative	validation	error
requires_action must reference known actionable event IDs	exception	error
successful JSON-RPC result requires HTTP 200	validation	error
tool name must match	validation	error
Cannot add shapes and	validation	error
tool_use requires name and object input	exception	error	messages-api, tool-use, validation, python
input	exception	error
: ; legacy compatibility is not allowlisted	exception	error	mcp, protocol-negotiation, legacy, config
window index out of range	exception	error
request did not receive a response	exception	error
evaluation case has invalid fixture or constraints	validation	error
requirements must identify one primary integration shape	validation	error
error	exception	error
No trainable parameters. Did you freeze the head as well?	validation	error
stop_reason tool_use had no tool_use block	exception	error
max_attempts must be positive	exception	error	python, validation, constructor, configuration
Messages API response must be an object	validation	error
demo transcript is missing mrtrAcrossInstances	validation	error
minLength cannot be greater than maxLength	validation	error
policy root must be an object	validation	error
could not build spec for	exception	error
override requires task_id, finding_code, reason, user_id…	validation	error
: correct modern request error before retrying	exception	error	mcp, rpc-error, discovery, fail-closed
: malformed legacy initialize result	exception	error	mcp, schema-validation, legacy, handshake
resume from AWAITING_TOOL requires a payload	validation	error
: RPC error	exception	error	mcp, rpc-error, tool-call
: expected , got	validation	error
: modern result omitted resultType	exception	error	mcp, schema-validation, modern-protocol
unsupported type	validation	error
property names must be strings	validation	error
reduce_scatter needs numel divisible by world_size, got	validation	error
unknown tool	exception	error
unknown prompt	validation	error	mcp, prompts, unknown-name, lookup
Cannot reshape elements into shape	validation	error
progressToken must be a string or integer	validation	error	mcp, validation, progress, type-check
schema must be a dict	validation	error
JSON-RPC error requires HTTP	validation	error
: unexpected fields	validation	error
: bounded legacy probe failed closed	exception	error	mcp, timeout, network, legacy
tc.mode	validation	error
release gate root must be an object	validation	error
unknown hook topic	validation	error
output	exception	error
correct must be 0/1 or boolean	validation	error
notification received a response body	validation	error
run() requires IDLE, got	exception	error
idle status needs a supported stop_reason	exception	error
paired arrays must align	validation	error
mode decision needs rationale, repetition, change policy…	validation	error
: does not match / /	validation	error
SLACK_SIGNING_SECRET is required	exception	error