desktop/src-tauri/crates/core/src/adapters/gemini/detect.rs

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//! Gemini detection: rewritten session JSON fingerprints (architecture.md#adapter-layout).

//!

//! Gemini session JSON has no version field. Use document-level format

//! [`super::versions::GEMINI_FORMAT_VERSION`]; there is no version dispatch

//! or unknown-version fallback as in the Codex registry.

//!

//! Detection rules (V17 rejects unrecognized shapes):

//! - Read the first 64 KiB, strip UTF-8 BOM; a nonobject prefix is UnknownFormat.

//!   Unrecognized files are not parsed by guessing their format.

//! - Missing sessionId/messages fingerprint is UnknownFormat.

//! - sessionId alone may indicate an initial write: Pending, then probe next round.

//! - A matching fingerprint is Supported with the registered document format;

//!   basis is KnownVersion.

/// Detection window: first 64 KiB, without parsing the entire file.

/// Detect one session JSON file.

/// A matching fingerprint selects the fixed document format with KnownVersion.

// Transient read failure (lock/timeout/disappearance) is Pending for the next probe.

// Without a native version field, select the registered document format session-doc-1

// with KnownVersion; this format has no unknown-version state.

// sessionId alone may indicate an incomplete initial write; probe again next round.