feat: Implement Mattermost sync functionality and enhance workspace context management

scripts/mattermost/.env.example

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+MATTERMOST_URL=https://tu-mattermost.example.com
+MATTERMOST_TOKEN=tu_personal_access_token
+CHANNEL_IDS=canal_id_1,canal_id_2
+MESSAGE_WINDOW_HOURS=24
+MAX_MESSAGES=200
+MATTERMOST_CA_BUNDLE=ca.pem
+MATTERMOST_SKIP_TLS_VERIFY=false
+MATTERMOST_OUTPUT_FILE=generated/mattermost_context.jsonl

scripts/mattermost/.gitignore

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+.env
+.venv/
+generated/
+__pycache__/
+*.py[cod]

scripts/mattermost/README.md

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+# Mattermost Sync
+
+This directory contains the workspace-local Mattermost extractor used by OpenCode to refresh communication context.
+
+## Files
+
+- `mattermost_context.py`
+  Extracts recent Mattermost messages as JSONL.
+- `sync.sh`
+  Stable wrapper intended to be called by OpenCode.
+- `.env.example`
+  Example configuration without secrets.
+- `requirements.txt`
+  Reserved for future optional dependencies.
+
+## Recommended Setup
+
+1. Copy `.env.example` to `.env`.
+2. Fill in your Mattermost values.
+3. Create a local virtual environment if you want an isolated runtime.
+
+Example:
+
+```bash
+cd scripts/mattermost
+bash bootstrap.sh
+```
+
+## Usage
+
+Manual run:
+
+```bash
+bash scripts/mattermost/sync.sh
+```
+
+OpenCode can use this script directly. If `FIDELITY_MATTERMOST_SYNC_CMD` is not set, the workspace plugins will fall back to this wrapper automatically.
+
+## Bootstrap
+
+You can initialize the local runtime with:
+
+```bash
+bash scripts/mattermost/bootstrap.sh
+```
+
+This will:
+
+- create `.venv/` if missing
+- create `.env` from `.env.example` if needed
+
+The current extractor uses only the Python standard library, so no third-party install is required.

scripts/mattermost/bootstrap.sh

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+#!/usr/bin/env bash
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+VENV_DIR="$SCRIPT_DIR/.venv"
+PYTHON_BIN="${PYTHON_BIN:-python3}"
+
+if ! command -v "$PYTHON_BIN" >/dev/null 2>&1; then
+  echo "Python interpreter not found: $PYTHON_BIN" >&2
+  exit 1
+fi
+
+if [[ ! -d "$VENV_DIR" ]]; then
+  "$PYTHON_BIN" -m venv "$VENV_DIR"
+fi
+
+if [[ ! -f "$SCRIPT_DIR/.env" ]]; then
+  cp "$SCRIPT_DIR/.env.example" "$SCRIPT_DIR/.env"
+  echo "Created $SCRIPT_DIR/.env from template. Fill in secrets before syncing."
+else
+  echo "Using existing $SCRIPT_DIR/.env"
+fi
+
+echo
+echo "Bootstrap complete."
+echo "Next steps:"
+echo "1. Review $SCRIPT_DIR/.env"
+echo "2. Run: bash scripts/mattermost/sync.sh"

scripts/mattermost/mattermost_context.py

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+#!/usr/bin/env python3
+
+import json
+import logging
+import os
+import ssl
+import sys
+from datetime import datetime, timedelta
+from pathlib import Path
+from typing import Any, Dict, List
+from urllib import error, parse, request
+
+
+SCRIPT_DIR = Path(__file__).resolve().parent
+DEFAULT_WINDOW_HOURS = 24
+DEFAULT_MAX_MESSAGES = 200
+MAX_PER_PAGE = 200
+DEFAULT_OUTPUT_FILE = str(SCRIPT_DIR / "generated" / "mattermost_context.jsonl")
+REQUEST_TIMEOUT = 15
+
+
+LOGGER = logging.getLogger("mattermost_context")
+USER_CACHE: Dict[str, Dict[str, Any]] = {}
+
+MATTERMOST_URL = ""
+CHANNEL_IDS: List[str] = []
+WINDOW_HOURS = DEFAULT_WINDOW_HOURS
+MAX_MESSAGES = DEFAULT_MAX_MESSAGES
+CUTOFF_TIMESTAMP_MS = 0
+OUTPUT_FILE = DEFAULT_OUTPUT_FILE
+REQUEST_HEADERS: Dict[str, str] = {}
+SSL_CONTEXT: ssl.SSLContext | None = None
+
+
+class MattermostAPIError(RuntimeError):
+    pass
+
+
+def parse_bool_env(name: str, default: bool = False) -> bool:
+    raw_value = os.getenv(name)
+    if raw_value is None:
+        return default
+    return raw_value.strip().lower() in {"1", "true", "yes", "on"}
+
+
+def load_dotenv_file(path: Path | None = None) -> None:
+    dotenv_path = path or (SCRIPT_DIR / ".env")
+    if not dotenv_path.exists():
+        return
+
+    with dotenv_path.open("r", encoding="utf-8") as file_handle:
+        for raw_line in file_handle:
+            line = raw_line.strip()
+            if not line or line.startswith("#"):
+                continue
+            if line.startswith("export "):
+                line = line[len("export ") :].strip()
+            if "=" not in line:
+                continue
+
+            key, value = line.split("=", 1)
+            key = key.strip()
+            value = value.strip()
+            if not key:
+                continue
+            if len(value) >= 2 and value[0] == value[-1] and value[0] in {'"', "'"}:
+                value = value[1:-1]
+
+            os.environ.setdefault(key, value)
+
+
+def require_env(name: str) -> str:
+    value = os.getenv(name, "").strip()
+    if not value:
+        raise ValueError(f"Missing required environment variable: {name}")
+    return value
+
+
+def parse_channel_ids(raw_value: str) -> List[str]:
+    normalized = raw_value.replace("\n", ",")
+    channel_ids = [item.strip() for item in normalized.split(",") if item.strip()]
+    if not channel_ids:
+        raise ValueError("CHANNEL_IDS must contain at least one channel id.")
+    return channel_ids
+
+
+def build_ssl_context() -> ssl.SSLContext:
+    ca_bundle = os.getenv("MATTERMOST_CA_BUNDLE", "").strip()
+    skip_tls_verify = parse_bool_env("MATTERMOST_SKIP_TLS_VERIFY", default=False)
+
+    if skip_tls_verify:
+        LOGGER.warning("TLS certificate verification is disabled via MATTERMOST_SKIP_TLS_VERIFY.")
+        return ssl._create_unverified_context()
+
+    if ca_bundle:
+        LOGGER.info("Using custom CA bundle from MATTERMOST_CA_BUNDLE: %s", ca_bundle)
+        return ssl.create_default_context(cafile=ca_bundle)
+
+    return ssl.create_default_context()
+
+
+def configure() -> None:
+    global MATTERMOST_URL, CHANNEL_IDS, WINDOW_HOURS, MAX_MESSAGES, CUTOFF_TIMESTAMP_MS, OUTPUT_FILE
+    global REQUEST_HEADERS, SSL_CONTEXT
+
+    load_dotenv_file()
+    MATTERMOST_URL = require_env("MATTERMOST_URL").rstrip("/")
+    token = require_env("MATTERMOST_TOKEN")
+    CHANNEL_IDS = parse_channel_ids(require_env("CHANNEL_IDS"))
+    WINDOW_HOURS = int(os.getenv("MESSAGE_WINDOW_HOURS", str(DEFAULT_WINDOW_HOURS)))
+    MAX_MESSAGES = int(os.getenv("MAX_MESSAGES", str(DEFAULT_MAX_MESSAGES)))
+    OUTPUT_FILE = os.getenv("MATTERMOST_OUTPUT_FILE", DEFAULT_OUTPUT_FILE).strip() or DEFAULT_OUTPUT_FILE
+
+    if WINDOW_HOURS <= 0:
+        raise ValueError("MESSAGE_WINDOW_HOURS must be greater than 0.")
+    if MAX_MESSAGES <= 0:
+        raise ValueError("MAX_MESSAGES must be greater than 0.")
+
+    cutoff = datetime.now().astimezone() - timedelta(hours=WINDOW_HOURS)
+    CUTOFF_TIMESTAMP_MS = int(cutoff.timestamp() * 1000)
+
+    REQUEST_HEADERS = {
+        "Authorization": f"Bearer {token}",
+        "Accept": "application/json",
+        "Content-Type": "application/json",
+    }
+    SSL_CONTEXT = build_ssl_context()
+
+
+def api_get_json(api_path: str, params: Dict[str, Any] | None = None) -> Dict[str, Any]:
+    query = f"?{parse.urlencode(params)}" if params else ""
+    url = f"{MATTERMOST_URL}{api_path}{query}"
+    req = request.Request(url, headers=REQUEST_HEADERS, method="GET")
+
+    try:
+        with request.urlopen(req, timeout=REQUEST_TIMEOUT, context=SSL_CONTEXT) as response:
+            charset = response.headers.get_content_charset() or "utf-8"
+            payload = response.read().decode(charset)
+    except error.HTTPError as exc:
+        body = ""
+        try:
+            body = exc.read().decode("utf-8", errors="replace")
+        except Exception:
+            body = ""
+        raise MattermostAPIError(f"HTTP {exc.code} for {api_path}: {body or exc.reason}") from exc
+    except error.URLError as exc:
+        reason = exc.reason if hasattr(exc, "reason") else str(exc)
+        raise MattermostAPIError(f"Request failed for {api_path}: {reason}") from exc
+
+    try:
+        return json.loads(payload)
+    except json.JSONDecodeError as exc:
+        raise MattermostAPIError(f"Invalid JSON returned by {api_path}") from exc
+
+
+def get_channel_posts(channel_id: str) -> List[Dict[str, Any]]:
+    collected: List[Dict[str, Any]] = []
+    page = 0
+    per_page = min(MAX_PER_PAGE, MAX_MESSAGES)
+
+    while len(collected) < MAX_MESSAGES:
+        payload = api_get_json(
+            f"/api/v4/channels/{channel_id}/posts",
+            {"page": page, "per_page": per_page},
+        )
+        order = payload.get("order", [])
+        posts_by_id = payload.get("posts", {})
+
+        if not order:
+            break
+
+        reached_cutoff = False
+        for post_id in order:
+            post = posts_by_id.get(post_id)
+            if not post:
+                continue
+
+            created_at = int(post.get("create_at", 0))
+            if created_at < CUTOFF_TIMESTAMP_MS:
+                reached_cutoff = True
+                continue
+
+            collected.append(post)
+            if len(collected) >= MAX_MESSAGES:
+                break
+
+        if reached_cutoff or len(order) < per_page:
+            break
+
+        page += 1
+
+    LOGGER.info("Fetched %s raw posts from channel %s", len(collected), channel_id)
+    return collected
+
+
+def get_user_info(user_id: str) -> Dict[str, Any]:
+    if not user_id:
+        return {"id": "", "username": "unknown"}
+
+    if user_id in USER_CACHE:
+        return USER_CACHE[user_id]
+
+    try:
+        user_data = api_get_json(f"/api/v4/users/{user_id}")
+    except MattermostAPIError as exc:
+        LOGGER.error("Could not fetch user %s: %s", user_id, exc)
+        fallback = {"id": user_id, "username": user_id}
+        USER_CACHE[user_id] = fallback
+        return fallback
+
+    USER_CACHE[user_id] = user_data
+    return user_data
+
+
+def build_user_map(messages: List[Dict[str, Any]]) -> Dict[str, str]:
+    user_map: Dict[str, str] = {}
+    user_ids = sorted({message["user_id"] for message in messages if message.get("user_id")})
+
+    for user_id in user_ids:
+        user_info = get_user_info(user_id)
+        username = (
+            user_info.get("username")
+            or user_info.get("nickname")
+            or user_info.get("first_name")
+            or user_id
+        )
+        user_map[user_id] = username
+
+    return user_map
+
+
+def is_system_message(post: Dict[str, Any]) -> bool:
+    post_type = (post.get("type") or "").strip()
+    return post_type.startswith("system_")
+
+
+def extract_messages() -> List[Dict[str, Any]]:
+    all_messages: List[Dict[str, Any]] = []
+
+    for channel_id in CHANNEL_IDS:
+        raw_posts = get_channel_posts(channel_id)
+        for post in raw_posts:
+            if is_system_message(post):
+                continue
+
+            message = (post.get("message") or "").strip()
+            if not message:
+                continue
+
+            all_messages.append(
+                {
+                    "channel_id": channel_id,
+                    "channel_ref": channel_id,
+                    "post_id": post.get("id", ""),
+                    "user_id": post.get("user_id", ""),
+                    "create_at": int(post.get("create_at", 0)),
+                    "message": message.replace("\r\n", "\n"),
+                    "root_id": post.get("root_id", ""),
+                    "reply_count": int(post.get("reply_count", 0)),
+                }
+            )
+
+    all_messages.sort(key=lambda item: item["create_at"])
+    if len(all_messages) > MAX_MESSAGES:
+        all_messages = all_messages[-MAX_MESSAGES:]
+
+    user_map = build_user_map(all_messages)
+    for message in all_messages:
+        message["username"] = user_map.get(message["user_id"], message["user_id"] or "unknown")
+
+    LOGGER.info("Prepared %s messages after filtering", len(all_messages))
+    return all_messages
+
+
+def format_messages(messages: List[Dict[str, Any]]) -> str:
+    lines: List[str] = []
+
+    for message in messages:
+        timestamp = datetime.fromtimestamp(message["create_at"] / 1000).astimezone()
+        username = message.get("username", "unknown")
+        post_id = message.get("post_id", "")
+        root_id = message.get("root_id", "")
+        thread_id = root_id or post_id or "unknown"
+        reply_count = int(message.get("reply_count", 0))
+
+        if root_id:
+            message_kind = "thread_reply"
+        elif reply_count > 0:
+            message_kind = "thread_root"
+        else:
+            message_kind = "channel_post"
+
+        channel_ref = message.get("channel_ref", message.get("channel_id", "unknown"))
+        record = {
+            "source": "mattermost",
+            "channel": channel_ref,
+            "channel_id": message.get("channel_id", ""),
+            "post_id": post_id,
+            "thread_id": thread_id,
+            "root_id": root_id or None,
+            "type": message_kind,
+            "timestamp": timestamp.isoformat(),
+            "username": username,
+            "message": message["message"],
+        }
+
+        if root_id:
+            record["reply_to"] = root_id
+        if reply_count > 0:
+            record["reply_count"] = reply_count
+
+        lines.append(json.dumps(record, ensure_ascii=False, sort_keys=False))
+
+    return "\n".join(lines)
+
+
+def save_to_file(text: str) -> None:
+    output_path = Path(OUTPUT_FILE).expanduser().resolve()
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    if text and not text.endswith("\n"):
+        text = f"{text}\n"
+    output_path.write_text(text, encoding="utf-8")
+
+
+def main() -> int:
+    logging.basicConfig(level=logging.INFO, format="%(asctime)s %(levelname)s %(message)s")
+
+    try:
+        configure()
+        messages = extract_messages()
+        output = format_messages(messages)
+        print(output)
+        save_to_file(output)
+        LOGGER.info("Saved context to %s", OUTPUT_FILE)
+    except ValueError as exc:
+        LOGGER.error("%s", exc)
+        return 1
+    except MattermostAPIError as exc:
+        LOGGER.error("%s", exc)
+        return 1
+    except Exception as exc:
+        LOGGER.exception("Unexpected error: %s", exc)
+        return 1
+
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main())

scripts/mattermost/requirements.txt

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+# No third-party dependencies are currently required.

scripts/mattermost/sync.sh

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+#!/usr/bin/env bash
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+if [[ -x "$SCRIPT_DIR/.venv/bin/python" ]]; then
+  PYTHON_BIN="$SCRIPT_DIR/.venv/bin/python"
+elif [[ -n "${PYTHON_BIN:-}" ]]; then
+  PYTHON_BIN="$PYTHON_BIN"
+else
+  PYTHON_BIN="python3"
+fi
+
+exec "$PYTHON_BIN" "$SCRIPT_DIR/mattermost_context.py"