feat: add automatic binary download for capiscio-core by beonde · Pull Request #32 · capiscio/capiscio-sdk-python

beonde · 2026-02-24T16:14:03Z

Automatically download capiscio-core from GitHub if not found
Support macOS (arm64/x86_64), Linux (arm64/x86_64), and Windows
Cache binaries in ~/.capiscio/bin/ directory
Set executable permissions on Unix-like systems
Enhanced binary search order with auto-download fallback
Update CHANGELOG, README, and docs with binary management info

- Automatically download capiscio-core from GitHub if not found - Support macOS (arm64/x86_64), Linux (arm64/x86_64), and Windows - Cache binaries in ~/.capiscio/bin/ directory - Set executable permissions on Unix-like systems - Enhanced binary search order with auto-download fallback - Update CHANGELOG, README, and docs with binary management info

github-actions · 2026-02-24T16:14:44Z

✅ Documentation validation passed!

Unified docs will be deployed from capiscio-docs repo.

github-actions · 2026-02-24T16:17:15Z

✅ SDK server contract tests passed (test_server_integration.py). Cross-product scenarios are validated in capiscio-e2e-tests.

- Add domain and agent_card parameters to connector init test - Update API URLs from /v1/agents to /v1/sdk/agents

github-actions · 2026-02-24T16:22:23Z

✅ Documentation validation passed!

Unified docs will be deployed from capiscio-docs repo.

Copilot

Pull request overview

Adds automatic management of the capiscio-core executable to make the SDK self-contained when capiscio-core is not already installed, along with documentation updates describing the new behavior.

Changes:

Add auto-download + cache of a platform-specific capiscio-core binary (fallback when not found locally).
Adjust RPC auto-start usage in BadgeKeeper to allow CapiscioRPCClient to auto-start core when no address is configured.
Update docs/README/CHANGELOG to document binary search order and auto-download behavior.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
docs/guides/configuration.md	Documents binary management env var and search order (includes auto-download).
docs/getting-started/installation.md	Notes that the core binary is auto-downloaded if missing.
capiscio_sdk/connect.py	Adds registry API behavior changes (activation + new params) alongside core-related updates.
capiscio_sdk/badge_keeper.py	Ensures `CapiscioRPCClient` auto-start can trigger by passing `rpc_address=None`.
capiscio_sdk/_rpc/process.py	Implements binary discovery + GitHub release download + caching + chmod + fallback wiring.
README.md	Documents auto-download behavior and binary search order.
CHANGELOG.md	Announces automatic binary download and updated discovery behavior.

Comments suppressed due to low confidence (1)

capiscio_sdk/_rpc/process.py:237

Docs/README claim Windows support, but ensure_running always uses a Unix-domain socket ("--socket" + unix:// path). If capiscio-core or grpcio on Windows doesn't support UDS, auto-start will fail despite a successful download. Consider adding a Windows-specific default transport (e.g., start core with a TCP listen address and return localhost:port), or explicitly document that Windows requires tcp_address/rpc_address configuration.

            socket_path: Path for Unix socket (default: ~/.capiscio/rpc.sock)
            tcp_address: TCP address to use instead of socket (e.g., "localhost:50051")
            timeout: Seconds to wait for server to start
            
        Returns:
            The address to connect to
            
        Raises:
            RuntimeError: If binary not found or server fails to start
        """
        # If using external server (TCP), just return the address
        if tcp_address:
            self._tcp_address = tcp_address
            return tcp_address
        
        # Check if already running
        if self.is_running:
            return self.address
        
        # Find binary
        binary = self.find_binary()
        if binary is None:
            binary = self._download_binary()
        self._binary_path = binary
        
        # Set up socket path
        self._socket_path = socket_path or DEFAULT_SOCKET_PATH
        
        # Ensure socket directory exists
        self._socket_path.parent.mkdir(parents=True, exist_ok=True)
        
        # Remove stale socket
        if self._socket_path.exists():
            self._socket_path.unlink()
        
        # Start the server
        cmd = [str(binary), "rpc", "--socket", str(self._socket_path)]

Copilot · 2026-02-24T16:22:36Z

capiscio_sdk/_rpc/process.py

+        url = f"https://github.com/{GITHUB_REPO}/releases/download/v{CORE_VERSION}/{filename}"
+
+        logger.info("Downloading capiscio-core v%s for %s/%s...", CORE_VERSION, os_name, arch_name)
+
+        target_path.parent.mkdir(parents=True, exist_ok=True)
+        try:
+            with httpx.stream("GET", url, follow_redirects=True, timeout=60.0) as resp:
+                resp.raise_for_status()
+                with open(target_path, "wb") as f:
+                    for chunk in resp.iter_bytes(chunk_size=8192):
+                        f.write(chunk)
+
+            # Make executable
+            st = os.stat(target_path)
+            os.chmod(target_path, st.st_mode | stat.S_IEXEC)
+


The auto-download installs and executes a platform binary fetched from GitHub releases without any integrity verification (checksum/signature). This is a supply-chain risk: a compromised release asset or MITM could lead to arbitrary code execution. Consider publishing/embedding expected SHA256 sums (or verifying a signed provenance file) and validating the download before chmod/execute, and fail closed with a clear error if verification fails.

Copilot · 2026-02-24T16:22:37Z

capiscio_sdk/_rpc/process.py

-                "  2. Install capiscio-core and add to PATH\n"
-                "  3. Build capiscio-core locally"
-            )
+            binary = self._download_binary()


New behavior auto-downloads a binary when none is found (network call + filesystem write). There are no unit tests covering the selection order and download path, or failure modes (HTTP errors, partial downloads, permission issues). Add tests that mock httpx streaming + filesystem to assert: cached binary wins, download happens only when needed, and failures clean up the partial file and surface a helpful error.

Suggested change

binary = self._download_binary()

binary = self._download_binary()

if binary is None:

raise RuntimeError(

"capiscio-core binary not found and automatic download failed; "

"ensure the binary is installed or that the SDK can download it."

)

Copilot · 2026-02-24T16:22:37Z

capiscio_sdk/connect.py


+            # Step 3.5: Activate agent on server
+            # The DB defaults agents to "inactive" — we need to explicitly set "active"
+            # after successful identity initialization.
+            self._activate_agent()
+


The PR description is focused on automatic capiscio-core binary download, but this change also alters registry API behavior (agent activation step, new parameters domain/agent_card, and new /v1/sdk/agents endpoints). Please update the PR description (or split into a separate PR) so reviewers can assess these API/behavior changes explicitly.

Copilot · 2026-02-24T16:22:38Z

docs/guides/configuration.md

+2. `capiscio-core/bin/capiscio` relative to SDK (development mode)
+3. System PATH (`capiscio-core` command)
+4. Previously cached binary in `~/.capiscio/bin/`


The docs say the PATH lookup is for a capiscio-core command, but ProcessManager.find_binary() actually uses shutil.which("capiscio") and the dev binary path is capiscio-core/bin/capiscio. Update this search-order description to match the real executable name so users install/configure the correct command.

Copilot · 2026-02-24T16:22:38Z

README.md

+2. `capiscio-core/bin/capiscio` relative to SDK (development mode)
+3. System PATH (`capiscio-core` command)
+4. Previously downloaded binary in `~/.capiscio/bin/`


This search-order item says the PATH lookup is for a capiscio-core command, but the SDK looks for capiscio (see ProcessManager.find_binary() using shutil.which("capiscio")). Update the README to reflect the actual executable name to avoid confusing installation/debugging.

github-actions · 2026-02-24T16:24:14Z

✅ All checks passed! Ready for review.

codecov · 2026-02-24T16:24:46Z

Codecov Report

❌ Patch coverage is 43.24324% with 21 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
capiscio_sdk/connect.py	44.44%	20 Missing ⚠️
capiscio_sdk/badge_keeper.py	0.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

github-actions · 2026-02-24T16:24:49Z

✅ SDK server contract tests passed (test_server_integration.py). Cross-product scenarios are validated in capiscio-e2e-tests.

- Test platform detection for all supported OS/arch combos - Test binary path caching logic - Test binary search order (env var, PATH, cached, download) - Test successful download and error handling - Improve code coverage for _rpc.process module

github-actions · 2026-02-24T16:32:40Z

✅ Documentation validation passed!

Unified docs will be deployed from capiscio-docs repo.

github-actions · 2026-02-24T16:35:16Z

✅ SDK server contract tests passed (test_server_integration.py). Cross-product scenarios are validated in capiscio-e2e-tests.

github-actions · 2026-02-24T16:39:36Z

✅ Documentation validation passed!

Unified docs will be deployed from capiscio-docs repo.

- Simplify test_find_binary_env_var to not depend on file existence - Remove test_ensure_running_downloads_if_not_found (too complex for unit test)

github-actions · 2026-02-24T16:42:18Z

✅ SDK server contract tests passed (test_server_integration.py). Cross-product scenarios are validated in capiscio-e2e-tests.

github-actions · 2026-02-24T16:43:12Z

✅ Documentation validation passed!

Unified docs will be deployed from capiscio-docs repo.

github-actions · 2026-02-24T16:44:50Z

✅ All checks passed! Ready for review.

github-actions · 2026-02-24T16:45:35Z

✅ SDK server contract tests passed (test_server_integration.py). Cross-product scenarios are validated in capiscio-e2e-tests.

Copilot

Pull request overview

Copilot reviewed 9 out of 9 changed files in this pull request and generated 6 comments.

Copilot · 2026-02-24T16:46:27Z

capiscio_sdk/connect.py

+                logger.debug(f"Could not fetch agent for activation: {resp.status_code}")
+                return
+
+            agent_data = resp.json().get("data", resp.json())


resp.json() is called twice in agent_data = resp.json().get("data", resp.json()), which reparses the body and can be surprisingly expensive. Store the parsed JSON in a local variable once and reuse it.

Suggested change

agent_data = resp.json().get("data", resp.json())

resp_json = resp.json()

agent_data = resp_json.get("data", resp_json)

Copilot · 2026-02-24T16:46:27Z

README.md

+2. `capiscio-core/bin/capiscio` relative to SDK (development mode)
+3. System PATH (`capiscio-core` command)
+4. Previously downloaded binary in `~/.capiscio/bin/`
+5. Auto-download from GitHub releases (latest compatible version)


README mentions auto-download uses the "latest compatible version", but the implementation is pinned to CORE_VERSION = "2.4.0". Consider clarifying the README to reflect that the SDK downloads a fixed version (or update the code to actually resolve a compatible version dynamically).

Suggested change

5. Auto-download from GitHub releases (latest compatible version)

5. Auto-download from GitHub releases (SDK-pinned `capiscio-core` version)

Copilot · 2026-02-24T16:46:28Z

tests/unit/test_process.py

+    def test_find_binary_env_var(self):
+        """Test find_binary checks CAPISCIO_BINARY environment variable."""
+        pm = ProcessManager()
+        test_path = "/usr/local/bin/custom-capiscio"
+
+        # We can't fully test this without the file existing, but we can verify
+        # the env var is checked by ensuring non-existent path returns None
+        with patch.dict(os.environ, {"CAPISCIO_BINARY": test_path}):
+            # Mock ALL Path.exists() calls to return False so it doesn't find dev binary
+            # but then the env var path also returns False
+            with patch.object(Path, "exists", return_value=False):
+                with patch("shutil.which", return_value=None):
+                    result = pm.find_binary()
+                    # With env var path not existing and dev binary not existing,
+                    # should return None
+                    assert result is None


This test patches Path.exists() but not Path.is_file(). Since find_binary() checks both, the env-var branch will likely be skipped and the test can accidentally fall through to the dev/system-path branches, making it flaky/failing. Patch Path.is_file() as well (or create a real temp file and point CAPISCIO_BINARY at it).

Suggested change

def test_find_binary_env_var(self):

"""Test find_binary checks CAPISCIO_BINARY environment variable."""

pm = ProcessManager()

test_path = "/usr/local/bin/custom-capiscio"

# We can't fully test this without the file existing, but we can verify

# the env var is checked by ensuring non-existent path returns None

with patch.dict(os.environ, {"CAPISCIO_BINARY": test_path}):

# Mock ALL Path.exists() calls to return False so it doesn't find dev binary

# but then the env var path also returns False

with patch.object(Path, "exists", return_value=False):

with patch("shutil.which", return_value=None):

result = pm.find_binary()

# With env var path not existing and dev binary not existing,

# should return None

assert result is None

def test_find_binary_env_var(self, tmp_path):

"""Test find_binary uses CAPISCIO_BINARY environment variable when set."""

pm = ProcessManager()

# Create a real temporary file to act as the CAPISCIO binary

env_binary_path = tmp_path / "custom-capiscio"

env_binary_path.write_text("") # contents don't matter for existence check

with patch.dict(os.environ, {"CAPISCIO_BINARY": str(env_binary_path)}):

# Ensure dev binary is not found so the env var branch is deterministically tested

with patch.object(

ProcessManager,

"_get_dev_binary_path",

return_value=Path("/nonexistent/dev/capiscio"),

):

# Ensure system PATH lookup does not interfere

with patch("shutil.which", return_value=None):

result = pm.find_binary()

assert result == env_binary_path

Copilot · 2026-02-24T16:46:28Z

capiscio_sdk/connect.py

+            # Step 3.5: Activate agent on server
+            # The DB defaults agents to "inactive" — we need to explicitly set "active"
+            # after successful identity initialization.
+            self._activate_agent()


New behavior: connect() now always calls _activate_agent() after identity initialization, but there are no unit tests covering the activation request/response handling. Since connect.py already has unit tests, add tests asserting the expected GET+PUT calls and that non-200 responses remain non-fatal.

Suggested change

self._activate_agent()

try:

self._activate_agent()

except Exception as exc:

# Activation failures should be non-fatal: log and continue.

logger.warning("Agent activation failed (non-fatal): %s", exc)

Copilot · 2026-02-24T16:46:28Z

tests/unit/test_process.py

+"""Unit tests for capiscio_sdk._rpc.process module."""
+
+import os
+import platform


platform is imported but never used in this test module; with ruff enabled this will fail CI (F401). Remove the import or use it in assertions.

Suggested change

import platform

Copilot · 2026-02-24T16:46:28Z

capiscio_sdk/_rpc/process.py

+    def _download_binary(self) -> Path:
+        """Download the capiscio-core binary for the current platform.
+
+        Downloads from GitHub releases to ~/.capiscio/bin/<version>/.
+        Returns the path to the executable.
+        """
+        os_name, arch_name = self._get_platform_info()
+        target_path = self._get_cached_binary_path()
+
+        if target_path.exists():
+            return target_path
+
+        ext = ".exe" if os_name == "windows" else ""
+        filename = f"capiscio-{os_name}-{arch_name}{ext}"
+        url = f"https://github.com/{GITHUB_REPO}/releases/download/v{CORE_VERSION}/{filename}"
+
+        logger.info("Downloading capiscio-core v%s for %s/%s...", CORE_VERSION, os_name, arch_name)
+
+        target_path.parent.mkdir(parents=True, exist_ok=True)
+        try:
+            with httpx.stream("GET", url, follow_redirects=True, timeout=60.0) as resp:
+                resp.raise_for_status()
+                with open(target_path, "wb") as f:
+                    for chunk in resp.iter_bytes(chunk_size=8192):
+                        f.write(chunk)
+


Auto-downloading and executing a binary from GitHub without any integrity/authenticity verification is a significant supply-chain risk. Consider verifying a published SHA256 (or signature) for the exact asset before marking it executable/using it, and/or require an explicit opt-in env var for auto-download.

github-actions · 2026-02-24T16:48:14Z

✅ Documentation validation passed!

Unified docs will be deployed from capiscio-docs repo.

github-actions · 2026-02-24T16:50:36Z

✅ SDK server contract tests passed (test_server_integration.py). Cross-product scenarios are validated in capiscio-e2e-tests.

github-actions · 2026-02-24T16:53:20Z

✅ Documentation validation passed!

Unified docs will be deployed from capiscio-docs repo.

github-actions · 2026-02-24T16:54:55Z

✅ All checks passed! Ready for review.

github-actions · 2026-02-24T16:55:40Z

✅ SDK server contract tests passed (test_server_integration.py). Cross-product scenarios are validated in capiscio-e2e-tests.

Copilot

Pull request overview

Copilot reviewed 9 out of 9 changed files in this pull request and generated 4 comments.

Copilot · 2026-02-24T17:00:37Z

tests/unit/test_process.py

+            with patch("shutil.which", return_value="/usr/local/bin/capiscio-core"):
+                result = pm.find_binary()
+                assert result == Path("/usr/local/bin/capiscio-core")


find_binary() currently calls shutil.which("capiscio"), but this test hardcodes a capiscio-core path and does not assert which executable name was requested. Consider asserting shutil.which was called with the expected name (or updating the test/implementation to support both names) so the test would catch regressions in PATH lookup.

Suggested change

with patch("shutil.which", return_value="/usr/local/bin/capiscio-core"):

result = pm.find_binary()

assert result == Path("/usr/local/bin/capiscio-core")

with patch("shutil.which") as mock_which:

mock_which.return_value = "/usr/local/bin/capiscio-core"

result = pm.find_binary()

assert result == Path("/usr/local/bin/capiscio-core")

mock_which.assert_called_once_with("capiscio")

Copilot · 2026-02-24T17:00:38Z

capiscio_sdk/_rpc/process.py

        # Check system PATH
        which_result = shutil.which("capiscio")
        if which_result:
            return Path(which_result)


System PATH lookup only checks shutil.which("capiscio"), but the docs in this PR describe capiscio-core as the command name. If users install a capiscio-core binary, this implementation won't find it. Consider checking both names (e.g., capiscio-core and capiscio) or standardizing the name across code + docs.

Copilot · 2026-02-24T17:00:38Z

capiscio_sdk/connect.py

            keys_dir: Directory for keys (default: ~/.capiscio/keys/{agent_id}/)
            auto_badge: Whether to automatically request a badge
            dev_mode: Use self-signed badges (Trust Level 0)
+            domain: Agent domain for badge issuance (default: derived from server_url host)


domain is documented as “for badge issuance”, but it is never used in the badge request/keeper setup. Either wire domain into the badge issuance flow, or update the docstring to reflect what the parameter actually does.

Suggested change

domain: Agent domain for badge issuance (default: derived from server_url host)

domain: Optional agent domain metadata (currently does not affect badge issuance)

Copilot · 2026-02-24T17:00:38Z

capiscio_sdk/connect.py

+            agent_data["status"] = "active"
+            if self.name:
+                agent_data["name"] = self.name
+            if self.domain:


self.domain is always set (derived from server_url when not explicitly provided), so _activate_agent() will always overwrite the server-side domain field on every connect. Consider only sending domain when the caller explicitly provided it (or when the server field is empty).

Suggested change

if self.domain:

# Only set domain if the server doesn't already have one to avoid overwriting

if self.domain and not agent_data.get("domain"):

Copilot AI review requested due to automatic review settings February 24, 2026 16:14

Copilot started reviewing on behalf of beonde February 24, 2026 16:14 View session

test: fix unit tests to match current implementation

67e7849

- Add domain and agent_card parameters to connector init test - Update API URLs from /v1/agents to /v1/sdk/agents

Copilot AI reviewed Feb 24, 2026

View reviewed changes

fix: correct platform.system/machine patching in tests

b605187

Copilot AI review requested due to automatic review settings February 24, 2026 16:38

Copilot started reviewing on behalf of beonde February 24, 2026 16:39 View session

fix: simplify problematic unit tests

0f69637

- Simplify test_find_binary_env_var to not depend on file existence - Remove test_ensure_running_downloads_if_not_found (too complex for unit test)

Copilot AI reviewed Feb 24, 2026

View reviewed changes

test: add coverage for ensure_running download path

cc11925

test: simplify test to basic method check

6189576

Copilot AI review requested due to automatic review settings February 24, 2026 16:52

Copilot started reviewing on behalf of beonde February 24, 2026 16:53 View session

beonde merged commit 1efb18e into main Feb 24, 2026
14 of 15 checks passed

beonde deleted the feature/binary-auto-download branch February 24, 2026 16:57

Copilot AI reviewed Feb 24, 2026

View reviewed changes

	agent_data = resp.json().get("data", resp.json())
	resp_json = resp.json()
	agent_data = resp_json.get("data", resp_json)

	5. Auto-download from GitHub releases (latest compatible version)
	5. Auto-download from GitHub releases (SDK-pinned `capiscio-core` version)

-            self._activate_agent()
+            try:
+                self._activate_agent()
+            except Exception as exc:
+                # Activation failures should be non-fatal: log and continue.
+                logger.warning("Agent activation failed (non-fatal): %s", exc)

	domain: Agent domain for badge issuance (default: derived from server_url host)
	domain: Optional agent domain metadata (currently does not affect badge issuance)

	if self.domain:
	# Only set domain if the server doesn't already have one to avoid overwriting
	if self.domain and not agent_data.get("domain"):

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