Stamp CLAUDE_CODE_ENTRYPOINT so phone-started sessions appear in the resume pickers

.changeset/olive-donkeys-shout.md

@@ -0,0 +1,5 @@
+---
+"shellular": patch
+---
+
+- fix(agents): set `CLAUDE_CODE_ENTRYPOINT` when spawning the Claude Code adapter, so sessions started from the app appear in `/resume` and in the VS Code session list instead of being filtered out as SDK sessions. An operator who exports their own value keeps it.

cli/src/agents/claude-code.ts

@@ -1,8 +1,33 @@
 import { BUILTIN_AGENT_DESCRIPTORS } from "./agents";
 import { ACP } from "./base";
 
+/**
+ * Claude Code records an `entrypoint` on every transcript record, and both of
+ * its resume pickers hide the ones that look machine-driven: `/resume` in the
+ * CLI and the session list in the VS Code extension each drop `sdk-cli`,
+ * `sdk-ts` and `sdk-py`. The Agent SDK that the ACP adapter runs on stamps
+ * `sdk-ts` unless the variable is already set, so a session started from the
+ * phone lands in ~/.claude/projects like any other and is then invisible at
+ * the desk, which is exactly where you want to pick it up.
+ *
+ * Any value outside that filtered set fixes it, with one exception: `cli` is
+ * rewritten to `sdk-cli` when Claude Code runs under the SDK, and is filtered
+ * again.
+ */
+const DEFAULT_ENTRYPOINT = "shellular";
+
 export class ClaudeCode extends ACP {
 	static create() {
 		return new ClaudeCode(BUILTIN_AGENT_DESCRIPTORS["claude-code"]);
 	}
+
+	/**
+	 * Only when the operator has not set one themselves, the way the SDK does
+	 * it. Baking it into the descriptor would win over an inherited value,
+	 * since `spawnAgentProcess` merges the descriptor env over `process.env`.
+	 */
+	protected override spawnEnvOverride(): Record<string, string> | undefined {
+		if (process.env.CLAUDE_CODE_ENTRYPOINT) return undefined;
+		return { CLAUDE_CODE_ENTRYPOINT: DEFAULT_ENTRYPOINT };
+	}
 }