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fix(cursor): improve session key uniqueness for multi-session safety

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Include system prompt prefix (first 200 chars) in session key derivation.
Claude Code sessions have unique system prompts containing cwd, session_id,
file paths, etc., making collisions between concurrent sessions from the
same user virtually impossible.

Session key now = SHA256(apiKey + model + systemPrompt[:200] + firstUserMsg)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
黄姜恒
2026-03-25 17:24:37 +08:00
parent c8e79c3787
commit 274f29e26b
1 changed files with 17 additions and 6 deletions
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23
internal/runtime/executor/cursor_executor.go
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@@ -1091,16 +1091,27 @@ func newH2Client() *http.Client {
func deriveSessionKey(clientKey string, model string, messages []gjson.Result) string {
var firstUserContent string
var systemContent string
for _, msg := range messages {
if msg.Get("role").String() == "user" {
role := msg.Get("role").String()
if role == "user" && firstUserContent == "" {
firstUserContent = extractTextContent(msg.Get("content"))
break
} else if role == "system" && systemContent == "" {
// System prompt differs per Claude Code session (contains cwd, session_id, etc.)
content := extractTextContent(msg.Get("content"))
if len(content) > 200 {
systemContent = content[:200]
} else {
systemContent = content
}
}
}
// Include client API key to prevent session collisions across users
input := clientKey + ":" + model + ":" + firstUserContent
if len(input) > 300 {
input = input[:300]
// Include client API key + system prompt hash to prevent session collisions:
// - Different users have different API keys
// - Different Claude Code sessions have different system prompts (cwd, tools, etc.)
input := clientKey + ":" + model + ":" + systemContent + ":" + firstUserContent
if len(input) > 500 {
input = input[:500]
}
h := sha256.Sum256([]byte(input))
return hex.EncodeToString(h[:])[:16]