diff --git a/src/openchronicle/capture/s1_parser.py b/src/openchronicle/capture/s1_parser.py
index f8466616..928013a3 100644
--- a/src/openchronicle/capture/s1_parser.py
+++ b/src/openchronicle/capture/s1_parser.py
@@ -13,6 +13,7 @@
 
 from __future__ import annotations
 
+import os
 import re
 from dataclasses import asdict, dataclass
 from typing import Any
@@ -29,7 +30,36 @@
     "com.operasoftware.Opera",
 }
 
+_EDITOR_BUNDLES = {
+    "com.microsoft.VSCode",
+    "com.microsoft.VSCodeInsiders",
+    "com.todesktop.230313mzl4w4u92",  # Cursor (Electron)
+    "com.codeium.windsurf",            # Windsurf
+    "com.cursor.Cursor",               # Cursor (alt)
+}
+
+_TERMINAL_BUNDLES = {
+    "com.apple.Terminal",
+    "com.googlecode.iterm2",
+    "dev.warp.Warp-Stable",
+    "com.alacritty.Alacritty",
+    "org.alacritty",
+    "co.zeit.hyper",
+    "net.kovidgoyal.kitty",
+}
+
+# Map bundle_id → trailing display-name suffix in window titles.
+_EDITOR_DISPLAY_SUFFIXES = {
+    "com.microsoft.VSCode":         " - Visual Studio Code",
+    "com.microsoft.VSCodeInsiders": " - Visual Studio Code - Insiders",
+    "com.todesktop.230313mzl4w4u92": " - Cursor",
+    "com.codeium.windsurf":          " - Windsurf",
+    "com.cursor.Cursor":             " - Cursor",
+}
+
 _URL_RE = re.compile(r"https?://\S+")
+# Match [git:branch] or [WSL:distro] or bare [branch] in editor titles.
+_BRACKET_BRANCH_RE = re.compile(r"\[(git:|WSL:)?([^\]]+)\]")
 
 _EDITABLE_ROLES = {"AXTextField", "AXTextArea", "AXComboBox"}
 _STATIC_ROLES = {"AXStaticText", "AXWebArea"}
@@ -57,7 +87,9 @@ def to_dict(self) -> dict[str, Any]:
 
 
 def enrich(capture: dict[str, Any]) -> None:
-    """Mutate ``capture`` in place: add ``focused_element`` / ``visible_text`` / ``url``.
+    """Mutate ``capture`` in place: add ``focused_element`` / ``visible_text`` / ``url``
+    plus app-specific fields (``editor_file`` / ``editor_project`` / ``editor_git_branch`` /
+    ``terminal_cwd``) when the frontmost app is a known editor or terminal.
 
     No-op when there is no ``ax_tree`` (e.g. AX unavailable, permission denied).
     """
@@ -70,12 +102,38 @@ def enrich(capture: dict[str, Any]) -> None:
         capture["focused_element"] = FocusedElement().to_dict()
         capture["visible_text"] = ""
         capture["url"] = None
+        capture["editor_file"] = None
+        capture["editor_project"] = None
+        capture["editor_git_branch"] = None
+        capture["terminal_cwd"] = None
         return
 
     capture["focused_element"] = _extract_focused_element(app_data).to_dict()
     capture["visible_text"] = _render_visible_text(app_data)
     capture["url"] = _extract_url(app_data)
 
+    # ── App-specific S1 fields ──────────────────────────────────────────
+    bundle = (app_data.get("bundle_id") or "").strip()
+
+    title = _get_window_title(app_data, capture)
+
+    capture["editor_file"] = None
+    capture["editor_project"] = None
+    capture["editor_git_branch"] = None
+    capture["terminal_cwd"] = None
+
+    if not title:
+        return
+
+    if bundle in _EDITOR_BUNDLES:
+        editor_info = _extract_editor_info(title, bundle)
+        capture["editor_file"] = editor_info[0]
+        capture["editor_project"] = editor_info[1]
+        capture["editor_git_branch"] = editor_info[2]
+
+    if bundle in _TERMINAL_BUNDLES:
+        capture["terminal_cwd"] = _extract_terminal_cwd(title)
+
 
 def _frontmost_app(ax_tree: dict[str, Any]) -> dict[str, Any] | None:
     apps = ax_tree.get("apps") or []
@@ -131,3 +189,119 @@ def _extract_url(app_data: dict[str, Any]) -> str | None:
             if "." in value and " " not in value:
                 return f"https://{value}"
     return None
+
+
+# ── App-specific S1 helpers ───────────────────────────────────────────────────
+
+
+def _get_window_title(app_data: dict[str, Any], capture: dict[str, Any]) -> str:
+    """Best-effort window title for the frontmost app.
+
+    Prefers ``window_meta.title`` (osascript — faster and avoids AX noise),
+    falls back to the first focused window title in the AX tree.
+    """
+    wm = capture.get("window_meta") or {}
+    title = (wm.get("title") or "").strip()
+    if title:
+        return title
+    for win in app_data.get("windows", []):
+        if win.get("focused"):
+            return (win.get("title") or "").strip()
+    return ""
+
+
+def _extract_editor_info(
+    title: str, bundle_id: str
+) -> tuple[str | None, str | None, str | None]:
+    """Parse an editor window title into ``(file, project, git_branch)``.
+
+    Handles the common VS Code / Cursor / Windsurf title patterns::
+
+        main.py — project-name - Visual Studio Code
+        app.ts — website [git:feat/auth] - Cursor
+        file.rs — project [WSL:Ubuntu] - Visual Studio Code
+        main.py - Visual Studio Code                         (no project)
+    """
+    # 1. Strip the trailing " - <AppDisplayName>" suffix.
+    suffix = _EDITOR_DISPLAY_SUFFIXES.get(bundle_id)
+    if suffix and title.endswith(suffix):
+        core = title[: -len(suffix)]
+    else:
+        core = title
+        # Fallback: try each known suffix in case bundle_id didn't match
+        # but we still have a recognisable title (e.g. a new fork).
+        for known_suffix in _EDITOR_DISPLAY_SUFFIXES.values():
+            if core.endswith(known_suffix):
+                core = core[: -len(known_suffix)]
+                break
+
+    core = core.strip()
+    if not core:
+        return None, None, None
+
+    # 2. Extract bracket annotation ([git:...], [WSL:...], [main]).
+    branch: str | None = None
+    m = _BRACKET_BRANCH_RE.search(core)
+    if m:
+        prefix = m.group(1) or ""
+        branch = prefix + m.group(2)
+        # Remove the bracket block from core so it doesn't pollute project/filename.
+        core = (core[: m.start()] + core[m.end() :]).strip()
+
+    # 3. Split on em dash (U+2014) to separate file from project.
+    if " — " in core:
+        file_part, _, project_part = core.partition(" — ")
+        file_part = _clean_file_token(file_part)
+        project_part = project_part.strip()
+        return file_part or None, project_part or None, branch
+
+    # 4. No em dash — try ASCII " - " as a weaker separator.
+    #    Only split when both sides look meaningful (avoid splitting
+    #    filenames like "my-app.ts").  When the title is "file - project",
+    #    left is the file and right is the project — same order as em-dash.
+    if " - " in core:
+        left, _, right = core.partition(" - ")
+        if _looks_like_filename(left) and _looks_like_filename(right):
+            return _clean_file_token(left) or None, _clean_file_token(right) or None, branch
+
+    # 5. No recognisable separator — the entire title is the filename.
+    file_part = _clean_file_token(core)
+    return file_part or None, None, branch
+
+
+def _clean_file_token(token: str) -> str:
+    """Remove noise suffixes like ``(diff)``, ``(read-only)`` from a file token."""
+    return re.sub(r"\s*\([^)]*\)\s*$", "", token.strip()).strip()
+
+
+def _looks_like_filename(token: str) -> bool:
+    """Heuristic: does ``token`` plausibly look like a file or project name?"""
+    token = token.strip()
+    return bool(token) and not token.startswith("[") and len(token) >= 2
+
+
+def _extract_terminal_cwd(title: str) -> str | None:
+    """Extract the current working directory from a terminal window title.
+
+    Terminal titles vary by emulator and shell config.  Common patterns::
+
+        vim — ~/projects/foo — zsh               (iTerm2 default)
+        ~/projects/foo — zsh — 80x24
+        user@host: /var/www                        (SSH)
+        Terminal                                    (no path — returns None)
+    """
+    # Split on common title separators and look for the first path-like token.
+    tokens = re.split(r"\s*[—–\-]\s*", title)
+    for token in tokens:
+        token = token.strip()
+        if not token:
+            continue
+        # SSH-style: user@host:/path or user@host:~/path
+        # (optional whitespace after colon).
+        ssh_m = re.match(r"^[^@]+@[^:]+:\s*([~/].+)$", token)
+        if ssh_m:
+            return os.path.normpath(os.path.expanduser(ssh_m.group(1)))
+        # Local path: ~/…, /…  (no ./ — relative to the daemon CWD, meaningless).
+        if token.startswith(("/", "~")):
+            return os.path.normpath(os.path.expanduser(token))
+    return None
diff --git a/src/openchronicle/mcp/captures.py b/src/openchronicle/mcp/captures.py
index 9c56cc94..0803dde6 100644
--- a/src/openchronicle/mcp/captures.py
+++ b/src/openchronicle/mcp/captures.py
@@ -105,6 +105,11 @@ def _format_response(
         },
         "visible_text": data.get("visible_text") or "",
         "screenshot_stripped": bool(data.get("screenshot_stripped")),
+        # App-specific S1 fields (populated for known editor / terminal apps).
+        "editor_file": data.get("editor_file"),
+        "editor_project": data.get("editor_project"),
+        "editor_git_branch": data.get("editor_git_branch"),
+        "terminal_cwd": data.get("terminal_cwd"),
     }
     if include_screenshot and shot.get("image_base64"):
         out["screenshot_b64"] = shot["image_base64"]
diff --git a/src/openchronicle/timeline/aggregator.py b/src/openchronicle/timeline/aggregator.py
index 1b765f6c..9abf835c 100644
--- a/src/openchronicle/timeline/aggregator.py
+++ b/src/openchronicle/timeline/aggregator.py
@@ -143,6 +143,20 @@ def _format_events(parsed: list[tuple[Path, dict]]) -> tuple[str, list[str]]:
         if url:
             parts.append(f"(URL: {url})")
 
+        # App-specific S1 fields — compact hints for the timeline LLM.
+        editor_file = data.get("editor_file")
+        if editor_file:
+            parts.append(f"(file: {editor_file})")
+        editor_project = data.get("editor_project")
+        if editor_project:
+            parts.append(f"(project: {editor_project})")
+        editor_branch = data.get("editor_git_branch")
+        if editor_branch:
+            parts.append(f"(git: {editor_branch})")
+        terminal_cwd = data.get("terminal_cwd")
+        if terminal_cwd:
+            parts.append(f"(cwd: {terminal_cwd})")
+
         fe = data.get("focused_element") or {}
         role = str(fe.get("role") or "")
         if role:
diff --git a/tests/test_mcp_tools.py b/tests/test_mcp_tools.py
index 545f80d8..1caddbcc 100644
--- a/tests/test_mcp_tools.py
+++ b/tests/test_mcp_tools.py
@@ -172,3 +172,125 @@ def test_current_context_app_filter(ac_root: Path) -> None:
 
     ctx = captures_mod.current_context(app_filter="Safari", headline_limit=5)
     assert [h["file_stem"] for h in ctx["recent_captures_headline"]] == ["c2"]
+
+
+# ── S1 editor / terminal fields exposed through MCP tools ───────────────────
+
+
+def _write_capture_json(ac_root: Path, stem: str, capture: dict) -> None:
+    """Write a capture JSON to the buffer directory with the given stem."""
+    import json
+
+    from openchronicle import paths
+
+    buf = paths.capture_buffer_dir()
+    filepath = buf / f"{stem}.json"
+    filepath.write_text(json.dumps(capture, ensure_ascii=False))
+
+
+def test_read_recent_capture_exposes_editor_fields(ac_root: Path) -> None:
+    """Agent calls read_recent_capture → response includes editor_file etc."""
+    _write_capture_json(ac_root, "2026-04-26T14-30-00p08-00", {
+        "timestamp": "2026-04-26T14:30:00+08:00",
+        "schema_version": 2,
+        "window_meta": {
+            "app_name": "Code",
+            "title": "main.py — openchronicle [git:main] - Visual Studio Code",
+            "bundle_id": "com.microsoft.VSCode",
+        },
+        "ax_tree": {},
+        "focused_element": {
+            "role": "AXTextArea", "title": "editor",
+            "value": "def foo(): pass", "is_editable": True,
+            "value_length": 16,
+        },
+        "visible_text": "## Code\n### main.py\n- [AXTextArea] editor — def foo(): pass",
+        "url": None,
+        "editor_file": "main.py",
+        "editor_project": "openchronicle",
+        "editor_git_branch": "git:main",
+        "terminal_cwd": None,
+        "screenshot_stripped": True,
+    })
+
+    result = captures_mod.read_recent_capture(
+        at="2026-04-26T14:30:00+08:00", app_name="Code",
+    )
+    assert result is not None, "should find the VS Code capture"
+    assert result["editor_file"] == "main.py"
+    assert result["editor_project"] == "openchronicle"
+    assert result["editor_git_branch"] == "git:main"
+    assert result["terminal_cwd"] is None
+
+
+def test_read_recent_capture_exposes_terminal_cwd(ac_root: Path) -> None:
+    """Agent calls read_recent_capture on iTerm2 → response includes terminal_cwd."""
+    import os
+    home = os.path.expanduser("~")
+
+    _write_capture_json(ac_root, "2026-04-26T14-35-00p08-00", {
+        "timestamp": "2026-04-26T14:35:00+08:00",
+        "schema_version": 2,
+        "window_meta": {
+            "app_name": "iTerm2",
+            "title": "vim — ~/projects/foo — zsh",
+            "bundle_id": "com.googlecode.iterm2",
+        },
+        "ax_tree": {},
+        "focused_element": {
+            "role": "AXTextArea", "title": "terminal",
+            "value": "$ ls", "is_editable": False,
+            "value_length": 4,
+        },
+        "visible_text": "## iTerm2\n### vim — ~/projects/foo — zsh\n- [AXTextArea] terminal — $ ls",
+        "url": None,
+        "editor_file": None,
+        "editor_project": None,
+        "editor_git_branch": None,
+        "terminal_cwd": f"{home}/projects/foo",
+        "screenshot_stripped": True,
+    })
+
+    result = captures_mod.read_recent_capture(
+        at="2026-04-26T14:35:00+08:00", app_name="iTerm2",
+    )
+    assert result is not None, "should find the iTerm2 capture"
+    assert result["terminal_cwd"] == f"{home}/projects/foo"
+    assert result["editor_file"] is None
+    assert result["editor_project"] is None
+
+
+def test_read_recent_capture_non_editor_has_null_fields(ac_root: Path) -> None:
+    """Agent calls read_recent_capture on a non-editor app → fields are None."""
+    _write_capture_json(ac_root, "2026-04-26T14-40-00p08-00", {
+        "timestamp": "2026-04-26T14:40:00+08:00",
+        "schema_version": 2,
+        "window_meta": {
+            "app_name": "Safari",
+            "title": "Example",
+            "bundle_id": "com.apple.Safari",
+        },
+        "ax_tree": {},
+        "focused_element": {
+            "role": "AXStaticText", "title": "",
+            "value": "some content", "is_editable": False,
+            "value_length": 12,
+        },
+        "visible_text": "## Safari\n### Example\n- some content",
+        "url": "https://example.com",
+        "editor_file": None,
+        "editor_project": None,
+        "editor_git_branch": None,
+        "terminal_cwd": None,
+        "screenshot_stripped": True,
+    })
+
+    result = captures_mod.read_recent_capture(
+        at="2026-04-26T14:40:00+08:00", app_name="Safari",
+    )
+    assert result is not None, "should find the Safari capture"
+    assert result["url"] == "https://example.com"
+    assert result["editor_file"] is None
+    assert result["editor_project"] is None
+    assert result["editor_git_branch"] is None
+    assert result["terminal_cwd"] is None
diff --git a/tests/test_s1_parser.py b/tests/test_s1_parser.py
index 87726446..52d69bfe 100644
--- a/tests/test_s1_parser.py
+++ b/tests/test_s1_parser.py
@@ -204,3 +204,198 @@ def test_enrich_falls_back_to_first_app_when_no_frontmost() -> None:
     }
     s1_parser.enrich(capture)
     assert "hello" in capture["visible_text"]
+
+
+# ── Editor / terminal S1 field extraction ────────────────────────────────────
+
+
+def test_extract_editor_info_standard() -> None:
+    """main.py — project-name - Visual Studio Code"""
+    file, project, branch = s1_parser._extract_editor_info(
+        "main.py — openchronicle - Visual Studio Code",
+        "com.microsoft.VSCode",
+    )
+    assert file == "main.py"
+    assert project == "openchronicle"
+    assert branch is None
+
+
+def test_extract_editor_info_with_git_branch() -> None:
+    """Cursor with [git:feat/auth] in title."""
+    file, project, branch = s1_parser._extract_editor_info(
+        "app.ts — website [git:feat/auth] - Cursor",
+        "com.todesktop.230313mzl4w4u92",
+    )
+    assert file == "app.ts"
+    assert project == "website"
+    assert branch == "git:feat/auth"
+
+
+def test_extract_editor_info_no_project() -> None:
+    """VS Code with no project folder open."""
+    file, project, branch = s1_parser._extract_editor_info(
+        "main.py - Visual Studio Code",
+        "com.microsoft.VSCode",
+    )
+    assert file == "main.py"
+    assert project is None
+    assert branch is None
+
+
+def test_extract_editor_info_wsl_branch() -> None:
+    """WSL remote — [WSL:Ubuntu] bracket annotation."""
+    file, project, branch = s1_parser._extract_editor_info(
+        "config.rs — my-project [WSL:Ubuntu] - Visual Studio Code",
+        "com.microsoft.VSCode",
+    )
+    assert file == "config.rs"
+    assert project == "my-project"
+    assert branch == "WSL:Ubuntu"
+
+
+def test_extract_editor_info_bare_bracket_branch() -> None:
+    """Bare [main] branch annotation (no git: prefix)."""
+    file, project, branch = s1_parser._extract_editor_info(
+        "README.md — docs [main] - Visual Studio Code",
+        "com.microsoft.VSCode",
+    )
+    assert file == "README.md"
+    assert project == "docs"
+    assert branch == "main"
+
+
+def test_extract_terminal_cwd_iterm2() -> None:
+    """iTerm2 default title: command — cwd — shell."""
+    cwd = s1_parser._extract_terminal_cwd(
+        "vim — ~/projects/foo — zsh"
+    )
+    assert cwd is not None
+    assert cwd.endswith("/projects/foo")
+
+
+def test_extract_terminal_cwd_ssh() -> None:
+    """SSH title: user@host:/path."""
+    cwd = s1_parser._extract_terminal_cwd(
+        "user@host: /var/www/html"
+    )
+    assert cwd == "/var/www/html"
+
+
+def test_extract_terminal_cwd_default() -> None:
+    """Default terminal title without a path."""
+    cwd = s1_parser._extract_terminal_cwd("Terminal")
+    assert cwd is None
+
+
+def test_extract_terminal_cwd_absolute_path() -> None:
+    """Absolute path in terminal title."""
+    cwd = s1_parser._extract_terminal_cwd(
+        "/tmp/build — bash — 80x24"
+    )
+    assert cwd == "/tmp/build"
+
+
+# ── enrich() integration with editor fields ──────────────────────────────────
+
+
+def test_enrich_vscode_sets_editor_fields() -> None:
+    """Full enrich() path for VS Code: window_meta title + AX tree."""
+    capture = {
+        "window_meta": {
+            "app_name": "Code",
+            "title": "s1_parser.py — openchronicle [git:main] - Visual Studio Code",
+            "bundle_id": "com.microsoft.VSCode",
+        },
+        "ax_tree": _ax_tree(
+            {
+                "name": "Code",
+                "bundle_id": "com.microsoft.VSCode",
+                "is_frontmost": True,
+                "windows": [
+                    {
+                        "title": "s1_parser.py — openchronicle [git:main] - Visual Studio Code",
+                        "focused": True,
+                        "elements": [
+                            {
+                                "role": "AXTextArea",
+                                "title": "editor",
+                                "value": "def enrich(capture):\n    ...",
+                            }
+                        ],
+                    }
+                ],
+            }
+        ),
+    }
+    s1_parser.enrich(capture)
+    assert capture["editor_file"] == "s1_parser.py"
+    assert capture["editor_project"] == "openchronicle"
+    assert capture["editor_git_branch"] == "git:main"
+
+
+def test_enrich_terminal_sets_cwd() -> None:
+    """Full enrich() path for iTerm2."""
+    import os
+    home = os.path.expanduser("~")
+
+    capture = {
+        "window_meta": {
+            "app_name": "iTerm2",
+            "title": "vim — ~/projects/foo — zsh",
+            "bundle_id": "com.googlecode.iterm2",
+        },
+        "ax_tree": _ax_tree(
+            {
+                "name": "iTerm2",
+                "bundle_id": "com.googlecode.iterm2",
+                "is_frontmost": True,
+                "windows": [
+                    {
+                        "title": "vim — ~/projects/foo — zsh",
+                        "focused": True,
+                        "elements": [
+                            {
+                                "role": "AXTextArea",
+                                "title": "terminal",
+                                "value": "$ ls\nfile1.txt",
+                            }
+                        ],
+                    }
+                ],
+            }
+        ),
+    }
+    s1_parser.enrich(capture)
+    assert capture["terminal_cwd"] == f"{home}/projects/foo"
+
+
+def test_enrich_non_editor_terminal_fields_are_none() -> None:
+    """Non-editor/non-terminal app gets None for all app-specific fields."""
+    capture = {
+        "window_meta": {
+            "app_name": "Safari",
+            "title": "Example",
+            "bundle_id": "com.apple.Safari",
+        },
+        "ax_tree": _ax_tree(
+            {
+                "name": "Safari",
+                "bundle_id": "com.apple.Safari",
+                "is_frontmost": True,
+                "windows": [
+                    {
+                        "title": "Example",
+                        "focused": True,
+                        "elements": [
+                            {"role": "AXStaticText", "value": "some content"}
+                        ],
+                    }
+                ],
+            }
+        ),
+    }
+    s1_parser.enrich(capture)
+    assert capture["editor_file"] is None
+    assert capture["editor_project"] is None
+    assert capture["editor_git_branch"] is None
+    assert capture["terminal_cwd"] is None