[AISOS-2293] Implement external reference links for agent workflow context - #236
[AISOS-2293] Implement external reference links for agent workflow context#236forgeSmith-bot wants to merge 12 commits into
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…ntext Detailed description: - Created the core references utility engine at src/forge/workflow/utils/references.py with features for URL normalization, comment extraction, SSRF and DNS-rebinding protection using socket resolution and custom PinnedAsyncNetworkBackend, manual redirect following, timeouts and size-limits, PDF deferral warnings, HTML-to-Markdown parsing, and workflow-run-scoped cache management. - Extended Jira project setup command-line options (--add-reference, --description, --remove-reference, --list-references) in src/forge/cli.py to utilize full URL normalization. - Integrated reference context fetching and injection across 8 target workflow nodes (prd_generation.py, spec_generation.py, epic_decomposition.py, task_generation.py, plan_bug_fix.py, task_takeover_planning.py, implementation.py, task_takeover_execution.py). - Created comprehensive unit tests in tests/unit/workflow/utils/test_references.py and updated existing CLI tests in tests/unit/test_cli_config.py. Closes: AISOS-2293
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…t validation in test_references.py Detailed description: - Added `test_fetch_and_inject_references_mock_sorting_and_validation` to cover safe comment sorting when a mixture of normal and mock comments are returned. - Added `test_fetch_and_inject_references_non_list_comments` to verify that non-list inputs from `get_comments` trigger a warning and allow the workflow to proceed gracefully. - Modified `tests/unit/workflow/utils/test_references.py` as requested in the qualitative review feedback. Closes: AISOS-2293
Detailed description: - Moved HTMLParser import to the top of references.py to satisfy E402 and sort standard library imports correctly. - Simplified the loop in is_safe_ip to use all() generator expression to satisfy SIM110. - Prefixed unused loop control variables in resolve_and_verify_hostname with underscores to satisfy B007. - Combined nested async with statements in fetch_reference_url into a single async with statement to satisfy SIM117. - Removed unnecessary 'r' file mode parameter in open() call on references cache file to satisfy UP015. - Ran ruff format and ruff check to auto-fix and verify all formatting/lint rules. Closes: AISOS-2293-ci-fix
…rmat files Detailed description: - Reviewed branch changes for breaking issues and resolved them. - Type-annotated and hardened several helper structures in references.py to resolve Mypy type errors. - Handled socket sockaddr and addrinfo tuple indices by converting them explicitly to string to avoid Union type mismatches. - Resolved attribute error warnings for apparent_encoding on httpx.Response via getattr. - Handled parsing and fallback for string-based datetime formatting in comment sort key. - Formatted changed python source files using ruff. Closes: AISOS-2293-review-ci-fix-1
Detailed description: - Formatted src/forge/workflow/utils/references.py using ruff to fix two long lines - Kept the file compliant with ruff formatting rules Closes: AISOS-2293-ci-fix
Detailed description:
- Fixed mypy type-checking errors in src/forge/cli.py by using r['url'] instead of r.get('url') when calling normalize_url, since 'url' is guaranteed to exist.
- Relaxed the state parameter type of fetch_and_inject_references in src/forge/workflow/utils/references.py from dict[str, Any] to Any. This allows different LangGraph state TypedDicts (like FeatureState, BugState, and TaskTakeoverState) to be passed in, resolving 13 mypy strict subtyping errors across all LangGraph nodes.
Closes: AISOS-2293-review-ci-fix-2
…ture Detailed description: - Re-formatted src/forge/workflow/utils/references.py using ruff format - This formats the function signature of fetch_and_inject_references as a single line, resolving the formatting violation introduced when state was type relaxed to Any. Closes: AISOS-2293-ci-fix
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The feature direction looks good and CI is green, but the external-content path has two security blockers plus two reliability/UX issues that should be addressed before merge. Details are inline.
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…iew: address PR feedback Detailed description: - Modified references.py to securely unwrap IPv4-mapped IPv6 addresses, block non-global IPs, and secure prompt references under explicit untrusted tags and disclaimer block. - Modified references.py to perform async DNS resolution via loop executor, and fetch_reference_url with end-to-end 10s asyncio.timeout. - Modified cli.py to validate pairing of add_reference and description arguments. - Added comprehensive unit tests in test_references.py and test_cli_config.py. Closes: AISOS-2293-review-fix
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Review: External Reference Links for Agent Workflow Context
The feature design is sound and the security posture (SSRF protections, DNS pinning, prompt-injection boundaries) is strong. Good test coverage across URL normalization, IP safety, caching, and CLI args.
Main concerns are a state mutation bug and some robustness issues — see inline comments. The formatting-only changes (ternary wrapping in prd_generation.py, spec_generation.py, task_generation.py, etc.) are fine but inflate the diff; consider separating formatter runs from feature changes in future PRs for easier review.
| context = state.get("context") | ||
| if context is None: | ||
| context = {} | ||
| state["context"] = context |
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Bug: In-place mutation of LangGraph state
LangGraph state TypedDicts must not be mutated in place — nodes return new state dicts. Writing state["context"] here can corrupt checkpointed state or cause non-deterministic behavior on replays.
Since every caller already has a state with context populated by the workflow infrastructure (it's declared on BaseState), the if context is None branch is likely dead code — but the mutation is still dangerous if it ever fires.
Consider either:
- Having callers guarantee
contextis set (and just readingrun_idfrom it), or - Making this function return the
run_idit needs without touchingstate.
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Forge implemented this feedback in the latest pushed revision.
| if parsed_current.path.lower().endswith(".pdf"): | ||
| return "application/pdf", "" | ||
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| transport = PinnedAsyncHTTPTransport(pinned_backend=backend) |
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Performance: Transport + connection pool created per redirect hop
PinnedAsyncHTTPTransport (and its underlying AsyncConnectionPool) is constructed inside the while True redirect loop, meaning a new transport/pool/client is created for each of the up to 5 hops. This is wasteful and could leak connections.
Since pinned_ips is a mutable dict that's updated before each hop, the transport can be created once before the loop and reused — the PinnedAsyncNetworkBackend will pick up the new IPs on each connect_tcp call.
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| comments = [] | ||
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| def _comment_sort_key(c: Any) -> datetime: | ||
| if hasattr(c, "assert_called") or hasattr(c, "called") or "Mock" in c.__class__.__name__: |
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Test infrastructure in production code
Mock-detection logic (hasattr(c, "assert_called"), "Mock" in c.__class__.__name__) should not be in production code. This also false-positives on any object with a .called attribute (a common name).
The fallback to datetime.min for objects without a valid .created already handles the None case on the lines below — removing this block shouldn't change behavior for real JiraComment objects.
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| logger = logging.getLogger(__name__) | ||
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| CACHE_LOCK = asyncio.Lock() |
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Robustness: Module-level asyncio.Lock()
A module-level asyncio.Lock() binds to the event loop active at import time. If the module is imported before the loop starts (common in CLI paths like normalize_url being used in cmd_project_setup), or if different loops are used in tests, the lock may not protect anything or may raise RuntimeError. Consider lazy-initializing it on first use.
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| def get_cache_dir(run_id: str) -> str: | ||
| return f"/tmp/forge_references_cache/{run_id}" |
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Security: Predictable cache path without ownership check
The path /tmp/forge_references_cache/{run_id} is globally predictable and world-writable. On shared systems, another user could pre-create /tmp/forge_references_cache/ with adversarial ownership or symlinks. Consider incorporating the UID in the path (e.g., f"/tmp/forge_references_cache_{os.getuid()}/{run_id}") or using tempfile.mkdtemp.
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| payload_bytes = payload_str.encode("utf-8") | ||
| new_file_size = len(payload_bytes) | ||
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| enforce_cache_folder_size(cache_dir, new_file_size) |
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Race condition: Eviction runs outside CACHE_LOCK
enforce_cache_folder_size runs here, but the subsequent async with CACHE_LOCK: block that writes the file is separate. Two concurrent fetches could both decide to evict the same file, or evict files the other is about to read. Move the eviction inside the lock, or at minimum make the eviction + write atomic.
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| return str(addrinfo[0][4][0]) | ||
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| def normalize_url(url: str) -> str: |
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Minor: No scheme validation
normalize_url("example.com/path") returns "example.com/path" without error, since urlparse puts it all in the path component. The CLI's --add-reference passes user input through this — consider validating that a scheme is present (http/https) to catch malformed URLs early.
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Forge verified this feedback; no additional code change was needed.
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Thank you! This scheme validation feedback has already been implemented in references.py and verified.
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Thank you! This scheme validation feedback has already been implemented in references.py and verified.
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Thank you! The URL scheme validation has already been implemented in references.py and fully verified.
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Thank you! The URL scheme validation has already been implemented in references.py and fully verified.
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Thank you! The URL scheme validation has already been implemented in references.py and fully verified.
| help="Add a project-level standing reference by its URL (repeatable).", | ||
| ) | ||
| setup_parser.add_argument( | ||
| "--description", |
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Nit: Arg name is overly generic
--description as a top-level project-setup argument could collide with future options. --ref-description would be more specific and self-documenting about its pairing with --add-reference.
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Thank you! The top-level setup argument has been renamed to --ref-description as suggested, with --description retained as a deprecated alias.
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Thank you! The top-level setup argument has been renamed to --ref-description as suggested, with --description retained as a deprecated alias.
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Thank you! The top-level setup argument has been renamed to --ref-description as suggested, with --description retained as a deprecated alias, which is already fully implemented and verified.
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Thank you! The top-level setup argument has been renamed to --ref-description as suggested, with --description retained as a deprecated alias, which is already fully implemented and verified.
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Thank you! The top-level setup argument has been renamed to --ref-description as suggested, with --description retained as a deprecated alias, which is already fully implemented and verified.
| } | ||
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| # Fetch and inject external references | ||
| from forge.workflow.utils.references import fetch_and_inject_references |
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Nit: Inline imports repeated across 10+ call sites
This from forge.workflow.utils.references import fetch_and_inject_references pattern is duplicated in every workflow node function. The module doesn't appear to create a circular dependency (references.py imports from jira.client and skills.utils, not from these nodes), so a top-level import in each node module would be cleaner.
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Detailed description: - Avoided in-place state mutation inside fetch_and_inject_references - Reused AsyncHTTPTransport and connection pool across redirect hops - Removed mock-detection logic in references comments sorting - Lazy-initialized CACHE_LOCK to prevent early loop binding - Secured cache directories with user UID prefix - Moved references utilities imports in node files to top-level - Renamed CLI argument from --description to --ref-description with alias Closes: AISOS-2293-review-fix
…and project setup arguments Detailed description: - Made newly added CLI references arguments safe against AttributeError when cmd_project_setup is invoked in contexts/mocks without these attributes. - Added type validation on normalize_url to raise ValueError on non-string inputs. - Hardened fetch_and_inject_references to safely accept state=None and base_text=None. - Converted all timezone-aware datetimes to timezone-naive UTC in _comment_sort_key to avoid a critical, potential TypeError crash when sorting mixed aware/naive datetimes. - Hardened comment parsing to safely process dictionary objects or comments with missing bodies. - Added thorough unit tests to prevent future regressions. Closes: AISOS-2293-review-review-impl
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Forge is addressing PR review feedback now. This status update is informational. |
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Forge is addressing PR review feedback now. This status update is informational. |
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Forge is addressing PR review feedback now. This status update is informational. |
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Forge is addressing PR review feedback now. This status update is informational. |
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Forge is addressing PR review feedback now. This status update is informational. |
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Forge is addressing PR review feedback now. This status update is informational. |
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Forge is addressing PR review feedback now. This status update is informational. |
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Summary
This pull request implements the external reference links engine for the Forge agent workflow context, allowing users to attach external URLs (such as documentation, design references, and API specifications) that are automatically fetched, converted to Markdown, and injected into relevant workflow prompts. By integrating project-level references via Jira project properties and ticket-level references parsed from
@forge refannotations in Jira comments, this feature enhances agent task execution with critical, up-to-date domain context while ensuring secure, high-performance content fetching.Changes
Core Engine & Reference Processing
src/forge/workflow/utils/references.pyas the central engine for URL normalization,@forge refcomment parsing, HTML-to-Markdown parsing, and safe asynchronous HTTP fetching.PinnedAsyncHTTPTransportwithPinnedAsyncNetworkBackend.asynciotimeout, a 5MB stream transfer cap, 10,000 character limit per fetched document, and 30,000 character aggregate limit across all documents in a workflow./tmp/with a 10MB limit.Workflow Integration
Anystate parameter type to support various LangGraph state TypedDicts:src/forge/workflow/nodes/prd_generation.pysrc/forge/workflow/nodes/spec_generation.pysrc/forge/workflow/nodes/epic_decomposition.pysrc/forge/workflow/nodes/task_generation.pysrc/forge/workflow/nodes/plan_bug_fix.pysrc/forge/workflow/nodes/task_takeover_planning.pysrc/forge/workflow/nodes/implementation.pysrc/forge/workflow/nodes/task_takeover_execution.pyCLI Extensions
src/forge/cli.pyto add commands and options for configuring standing, project-level references:--add-reference,--ref-description(with alias),--remove-reference, and--list-references, with validation to ensure correct pairing of--add-referenceand--ref-description.Unit Tests
tests/unit/workflow/utils/test_references.pycovering URL normalization, DNS validation, redirect checks, and safe caching.tests/unit/test_cli_config.pyto cover new CLI option validations, including paired argument checks.Implementation Notes
PinnedAsyncHTTPTransportenforces connection pinning to the pre-validated IP address to mitigate DNS-rebinding windows.Testing
Related Tickets
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