Struct EditParams 

pub struct EditParams {

    pub path: String,
    pub old_string: String,
    pub new_string: String,
    pub replace_all: bool,
    pub create: bool,
    pub expected_blake3: Option<String>,
    pub expected_size: Option<u64>,
    pub expected_mtime_ms: Option<u64>,
    pub backup: bool,
    pub backup_path: Option<String>,
    pub evidence: bool,
    pub diff_artifact: bool,
    pub diff_max_lines: usize,
    pub allow_lossy_utf8: bool,
}

Parameters for a file edit operation: path, old/new strings, and flags.

Fields

path: String

old_string: String

new_string: String

replace_all: bool

create: bool

expected_blake3: Option<String>

Optional preimage guards. If provided, ctx_edit fails if the current file preimage differs.

The content guard is BLAKE3, named for what it is (#1592); the wire parameter expected_md5 stays accepted as an alias for existing callers.

expected_size: Option<u64>

expected_mtime_ms: Option<u64>

backup: bool

Optional backup before writing.

backup_path: Option<String>

evidence: bool

Emit the digests and the bounded, redacted diff in the result.

diff_artifact: bool

Without evidence: archive the diff for a host renderer and name it in a short [diff:<id>] trailer (see diff_artifact_trailer).

diff_max_lines: usize

allow_lossy_utf8: bool

Reject invalid UTF-8 by default; allow lossy reads only when explicitly enabled.