skiagram_core/adapters/
cursor.rs

1//! Cursor adapter — STUB, intentionally deferred (CLAUDE.md §11 v0.4).
2//!
3//! Schema VERIFIED against real local data 2026-06-16 (Windows, `%APPDATA%`):
4//! - Chat lives in the **`cursorDiskKV`** table of `state.vscdb` (NOT `ItemTable`,
5//!   which only holds UI/workbench keys). Cross-workspace conversations are in
6//!   `User/globalStorage/state.vscdb`; per-workspace ones under
7//!   `User/workspaceStorage/<hash>/state.vscdb`.
8//! - Keys: `composerData:<composerId>` = one conversation
9//!   (`modelConfig.modelName`, `contextTokensUsed`/`contextTokenLimit`,
10//!   `fullConversationHeadersOnly` ordering); `bubbleId:<composerId>:<bubbleId>`
11//!   = one message (`type`, `requestId`, `toolFormerData`, `toolResults`, and a
12//!   `tokenCount: { inputTokens, outputTokens }`).
13//!
14//! WHY DEFERRED (not a difficulty — a payoff problem): on real data the per-message
15//! `tokenCount` is **~99% zeroed** (3 of 275 bubbles non-zero in a real
16//! globalStorage db) and `modelConfig.modelName` is frequently the literal
17//! `"default"` (unresolvable to a price). So Cursor cannot deliver skiagram's core
18//! "correct accounting" wedge — it would be a structural-only adapter (sessions /
19//! models / context-window fill) like the Copilot one. Implementing it also pulls
20//! in `rusqlite` with the bundled C SQLite (a compiled dep on a project that prizes
21//! a lean static binary, §12). The cost/benefit doesn't clear the bar yet; revisit
22//! if Cursor starts recording real per-request usage. Open READ-ONLY when built.
23
24use crate::adapters::Adapter;
25use crate::model::{Session, SessionRef};
26
27pub struct Cursor;
28
29impl Adapter for Cursor {
30    fn id(&self) -> &'static str {
31        "cursor"
32    }
33
34    fn detect(&self) -> bool {
35        // `config_dir` = %APPDATA% / ~/Library/Application Support / ~/.config.
36        directories::BaseDirs::new().is_some_and(|b| {
37            b.config_dir()
38                .join("Cursor")
39                .join("User")
40                .join("workspaceStorage")
41                .is_dir()
42        })
43    }
44
45    fn discover(&self) -> anyhow::Result<Vec<SessionRef>> {
46        anyhow::bail!("cursor adapter not yet implemented — deferred by design (Cursor's per-request token counts are ~99% zeroed on real data); see adapters/cursor.rs module docs")
47    }
48
49    fn parse(&self, _r: &SessionRef) -> anyhow::Result<Session> {
50        anyhow::bail!("cursor adapter not yet implemented")
51    }
52}
skiagram_core/adapters/cursor.rs

skiagram_core/adapters/
cursor.rs
