Module apply_patch 

Patch tool facade that exposes Codex-compatible patch parsing and application.

Actual patch parsing logic lives in tools::editing::patch so future edit features can reuse the same primitives without depending on this facade.

Re-exports

pub use crate::tools::editing::Patch;

pub use crate::tools::editing::PatchError;

pub use crate::tools::editing::PatchHunk;

pub use crate::tools::editing::PatchLine;

pub use crate::tools::editing::PatchOperation;

Structs

ApplyPatchInput

Input structure for the apply_patch tool

DecodedApplyPatchInput

Constants

APPLY_PATCH_ALIAS_DESCRIPTION

Model-visible description of the patch alias field. The old value (“Alias for input”) gave the model no format guidance, so it often placed a standard unified diff (---/+++) there — which apply_patch rejects (checkpoint turn_615). The full envelope and path rules live on the tool description and the input field; this alias keeps only the turn_615-critical rejection signal plus the alias relationship, so the same guidance is not sent three times per request.

APPLY_PATCH_ARGUMENT_CORRECTION

APPLY_PATCH_TOOL_DESCRIPTION

Model-visible description of the apply_patch tool. It leads with the accepted envelope so the model writes the right format on the first try, and states the unified-diff rejection and path rules as plain facts instead of shouted warnings. Registration sites append SEMANTIC_ANCHOR_GUIDANCE via with_semantic_anchor_guidance.

DEFAULT_APPLY_PATCH_INPUT_DESCRIPTION

MAX_DECODED_PATCH_BYTES

Maximum allowed decoded patch size — same as UNIFIED_FILE_MAX_PAYLOAD_BYTES but exposed with a more specific name to clarify that it is enforced at decode time, not preflight time.

SEMANTIC_ANCHOR_GUIDANCE

UNIFIED_FILE_MAX_PAYLOAD_BYTES

Hard upper bound for any single apply_patch payload after base64 decoding. The preflight cap mirrors this same value; both share the same env-var override.

UNIFIED_FILE_MAX_PAYLOAD_BYTES_ENV

Env var name that overrides both the preflight cap and the post-decode cap.

Functions

decode_apply_patch_input

effective_max_payload_bytes

Resolve the effective cap, honoring the env-var override. A 1 KiB safety floor is enforced so a sub-floor override can never silently disable the post-decode cap; values below the floor fall back to the default. The same floor is applied by the preflight resolver in execution_kernel so both stages agree on the effective cap.

mutation_target_paths

Extract filesystem paths affected by a mutating tool call.

parameter_schema

patch_mutation_target_paths

Return every path mutated by an already-parsed patch.

patch_source_from_args

with_semantic_anchor_guidance