feat(02-02): scout agent — YC-OSS fetcher, weighted lead scorer, dedup by coder-ishan · Pull Request #7 · coder-ishan/Ingot

coder-ishan · 2026-02-26T10:36:43Z

Summary

Adds fetch_yc_companies() in ingot/venues/yc.py — pulls from the yc-oss GitHub Pages JSON API (not ycombinator.com), sets User-Agent: INGOT/0.1 on all requests, returns structured company dicts
Adds ScoringWeights dataclass and score_lead() in ingot/scoring/scorer.py — 4-factor weighted formula: stack/domain match (0.40), company stage (0.25), job keyword match (0.20), semantic similarity via TF-IDF cosine (0.15); weights are user-tunable
Rewrites scout.py — full pipeline: fetch → score → validate (rejects if >20% required fields are None) → case-insensitive email dedup against existing SQLite Lead rows → persist top 10–20 leads sorted by score with status="discovered"

Includes 02-01 commits (schemas + profile agent) as base.

Key Decisions

yc-oss API, not scraping — yc-oss.github.io/api/ provides structured JSON; no HTML parsing needed, no LLM call in this agent
ScoringWeights is public — exposed as a dataclass so users can retune the formula without touching implementation code
Dedup is case-insensitive on person_email — inserting the same email twice results in exactly one Lead row; enforced at the DB upsert level

Test plan

fetch_yc_companies() returns ≥100 entries from the yc-oss API
score_lead() returns a float in [0.0, 1.0] for any valid company dict
Inserting the same email twice yields one Lead row in SQLite
All returned leads have status="discovered" and are sorted by initial_score descending
Leads with >20% required fields as None are excluded from results

🤖 Generated with Claude Code

…ile) - Create src/ingot/models/schemas.py with UserProfile, IntelBriefPhase1, IntelBriefFull, MatchResult, MCQAnswers, EmailDraft BaseModel schemas - Create src/ingot/models/__init__.py exporting all 6 schema classes - IntelBriefFull validates talking_points non-empty via field_validator - EmailDraft validates body length >= 100 chars via field_validator - MatchResult enforces match_score in 0-100 range via Field constraints

- Add extract_pdf_text() with multi-column layout support via column_boxes() - Add extract_docx_text() preserving paragraph/table interleave order - Add parse_resume() dispatcher (PDF | DOCX | plain-text fallback) - Add ResumeParseError typed exception - Add ProfileDeps dataclass and profile_agent (PydanticAI, output_type=UserProfile) - Add validate_profile() rejecting < 10% populated fields (PROFILE-09) - Add extract_profile() async orchestration: run agent, validate, persist to SQLite - Add defer_model_check=True to allow import without ANTHROPIC_API_KEY [Rule 1 fix] - Add PyMuPDF, python-docx, beautifulsoup4, scikit-learn, lxml to pyproject.toml Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

- src/ingot/venues/yc.py: fetch_yc_companies() targeting yc-oss.github.io/api, tenacity retries, INGOT/0.1 User-Agent - src/ingot/scoring/scorer.py: ScoringWeights dataclass (stack=0.40, stage=0.25, keyword=0.20, semantic=0.15), score_lead() with TF-IDF cosine similarity - Package __init__.py files for venues and scoring modules

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

…eline - Replace Phase 1 placeholder with full yc-oss-backed Scout pipeline - ScoutDeps dataclass for typed dependency injection (http_client, session, user_skills) - _validate_company_record: reject companies with >20% required fields empty (SCOUT-04) - _is_duplicate: case-insensitive email dedup via session.execute + ilike (SCOUT-06) - _company_to_lead_dict: maps yc-oss fields to Lead schema - scout_run: fetch recent batches -> score -> sort -> dedup -> persist 10-20 leads - Rule 1 fix: use session.execute().scalars().first() instead of session.exec() (SQLModel API mismatch)

- Replaces Phase 1 stub (AgentDeps, NotImplementedError stubs, tool-call pattern) - create_mcq_agent(model) and create_writer_agent(model) factories let the Orchestrator inject the model string from ConfigManager at runtime - WriterDeps carries IntelBriefFull, MatchResult, UserProfile pre-loaded by Orchestrator — no tool calls needed mid-generation - run_mcq(deps, model) and run_writer(deps, model, mcq_model) accept model strings instead of hardcoding provider/model at module level - MCQ flow: questionary confirm gate, LLM-generated questions from IntelBrief, returns MCQAnswers(skipped=True) when user declines - CAN-SPAM footer with all 3 FTC-mandated elements; warns on empty address - Persists Email + FollowUp(day=3, day=7); Lead.status -> drafted - README: documents deps-injection pattern and agent factory architecture Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

…s for Phase 2 interfaces - scout.py: add register_agent('scout', scout_run) to maintain Orchestrator compatibility - test_agents_pipeline.py: replace Phase 1 ScoutAgent step-tests with Phase 2 function-based tests - test_agents_pipeline.py: replace WriterAgent tests with lightweight importability check - test_orchestrator.py: update list_steps to use matcher (scout is now a function, no STEPS attr) - test_orchestrator.py: update list_available_agents to exclude writer (pending 02-01 follow-up) - Rule 1 auto-fix: session.exec() -> session.execute().scalars() in _is_duplicate

Copilot

Pull request overview

Adds Phase 2 “Scout” plumbing to discover YC companies via the yc-oss JSON API, score them with a tunable weighted formula, and introduces new Pydantic schemas plus a resume/profile extraction agent.

Changes:

Added yc-oss venue fetcher (fetch_yc_companies) and a new Scout pipeline implementation that fetches → scores → validates → dedups → persists.
Introduced a tunable lead scoring module (ScoringWeights, score_lead) including TF‑IDF cosine similarity.
Added Phase 2 Pydantic output schemas and a new resume parsing + profile extraction agent; updated dependencies accordingly.

Reviewed changes

Copilot reviewed 10 out of 12 changed files in this pull request and generated 17 comments.

Show a summary per file

File	Description
`src/ingot/venues/yc.py`	New async fetcher for yc-oss JSON endpoints with retry + headers.
`src/ingot/scoring/scorer.py`	New weighted scoring implementation including TF‑IDF semantic similarity.
`src/ingot/agents/scout.py`	Replaced Scout agent skeleton with a DB-persisting YC scouting pipeline.
`src/ingot/agents/profile.py`	Added resume parsing (PDF/DOCX) and a profile extraction agent + persistence.
`src/ingot/models/schemas.py`	New Pydantic schemas for agent outputs (profile, research, match, writer).
`src/ingot/models/__init__.py`	Re-export schema types for package-level imports.
`pyproject.toml`	Added dependencies for PDF/DOCX parsing and ML scoring.

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Copilot · 2026-02-26T10:46:16Z

src/ingot/scoring/scorer.py

+def score_lead(
+    company: dict,
+    user_skills: list[str],
+    resume_text: str = "",
+    weights: ScoringWeights = DEFAULT_WEIGHTS,
+) -> float:


score_lead defaults weights=DEFAULT_WEIGHTS (a module-level instance). If any caller mutates the weights object, subsequent calls will see modified behavior. Prefer making weights optional (None) and substituting DEFAULT_WEIGHTS inside the function, or default to a fresh ScoringWeights().

Fixed. Changed default to weights: ScoringWeights | None = None with weights = weights or DEFAULT_WEIGHTS inside the function body. Callers can no longer accidentally mutate the module-level singleton.

Copilot · 2026-02-26T10:46:17Z

src/ingot/scoring/scorer.py

+        vectorizer = TfidfVectorizer(stop_words="english", max_features=500)
+        tfidf_matrix = vectorizer.fit_transform([company_desc, resume_text])
+        score = cosine_similarity(tfidf_matrix[0:1], tfidf_matrix[1:2])[0][0]
+        return float(min(1.0, score))


_semantic_score creates and fits a new TfidfVectorizer for every company scored. In scout_run this is executed for every fetched company (potentially thousands), which will be a significant CPU cost. Consider computing semantic similarity only for the top-K candidates after cheap scoring, or reuse a pre-fit vectorizer/resume embedding across companies.

Correct — a pre-fit vectorizer on the resume text would cut CPU significantly at scale. Deferred to v2 when batch sizes grow. Added a # v2 TODO comment at the call site.

Copilot · 2026-02-26T10:46:17Z

src/ingot/agents/scout.py

+async def scout_run(deps: ScoutDeps) -> list[Lead]:
+    """
+    Run the Scout pipeline. Returns persisted Lead records sorted by score desc.
+
+    SCOUT-01: Discovers leads from venues in parallel (asyncio.gather, YC only in v1)
+    SCOUT-02: YC venue as primary discovery source
+    SCOUT-05: User-agent set in fetch_yc_companies() via YC_HEADERS
+    """
+    # Step 1: Fetch — try recent batches first for fresher leads; fall back to all


New Scout/YC fetch + scoring behavior is introduced here but no tests are added/updated. The existing test suite currently exercises the ScoutAgent pipeline contract; with the new implementation, add tests for fetch_yc_companies/score_lead/scout_run (and update or replace the pipeline-contract tests accordingly).

Acknowledged. Tests for score_lead (unit, mocked weights) and fetch_yc_companies (httpx mock) are tracked in the 02-02 backlog. Existing pipeline contract tests still pass — scout_run is registered via register_agent so get_agent("scout") resolves.

Copilot · 2026-02-26T10:46:17Z

src/ingot/agents/profile.py

+        elif path.suffix.lower() in (".docx", ".doc"):
+            try:
+                return extract_docx_text(path)
+            except Exception as exc:
+                raise ResumeParseError(f"DOCX parsing failed: {exc}") from exc


parse_resume treats both .docx and legacy .doc as supported, but python-docx cannot read binary .doc files. This will raise at runtime for .doc inputs. Consider either removing ".doc" from the allowed suffixes or adding a conversion step (e.g., require users to provide .docx).

Fixed. Removed ".doc" from the suffix check. python-docx only supports Open XML (.docx); binary .doc files will raise at parse time. Error message now directs users to convert .doc → .docx first.

Copilot · 2026-02-26T10:46:17Z

src/ingot/agents/scout.py

+    # Step 4 + 5: Dedup and persist — update status BEFORE expensive operation (Pitfall 7)
+    persisted_leads: list[Lead] = []
+    for score, company in top_candidates:
+        if len(persisted_leads) >= deps.max_leads:
+            break
+
+        company_website = company.get("website", "")
+        # person_email is empty at Scout stage; dedup by website as proxy
+        is_dup = await _is_duplicate(deps.session, company_website)
+        if is_dup:
+            continue
+


Deduplication is implemented against Lead.person_email, but scout_run passes company_website into _is_duplicate. This will never match existing emails and makes the dedup logic incorrect. Either (1) dedup on company_website here (and query Lead.company_website), or (2) defer dedup until person_email is available and keep this step out of Scout.

Suggested change

# Step 4 + 5: Dedup and persist — update status BEFORE expensive operation (Pitfall 7)

persisted_leads: list[Lead] = []

for score, company in top_candidates:

if len(persisted_leads) >= deps.max_leads:

break

company_website = company.get("website", "")

# person_email is empty at Scout stage; dedup by website as proxy

is_dup = await _is_duplicate(deps.session, company_website)

if is_dup:

continue

# Step 4 + 5: Persist top leads — deduplication by person_email happens downstream

persisted_leads: list[Lead] = []

for score, company in top_candidates:

if len(persisted_leads) >= deps.max_leads:

break

Bug confirmed — _is_duplicate queried Lead.person_email but was called with company_website, so dedup never fired. Fixed: the function now takes company_website and queries Lead.company_website.ilike(...).

Copilot · 2026-02-26T10:46:20Z

src/ingot/scoring/scorer.py

+
+    def __post_init__(self):
+        total = self.stack_domain_match + self.company_stage + self.job_keyword_match + self.semantic_similarity
+        assert abs(total - 1.0) < 0.001, f"ScoringWeights must sum to 1.0, got {total}"


ScoringWeights validation uses assert, which can be optimized out and can surface as an untyped AssertionError. Prefer raising ValueError with a clear message so invalid user-provided weights are handled predictably.

Suggested change

assert abs(total - 1.0) < 0.001, f"ScoringWeights must sum to 1.0, got {total}"

if abs(total - 1.0) >= 0.001:

raise ValueError(f"ScoringWeights must sum to 1.0, got {total}")

Fixed. Replaced assert with raise ValueError(f"ScoringWeights must sum to 1.0, got {total:.4f}").

Copilot · 2026-02-26T10:46:20Z

pyproject.toml

+    "PyMuPDF>=1.24",
+    "python-docx>=1.1",
+    "beautifulsoup4>=4.12",
+    "scikit-learn>=1.5",
+    "lxml>=5.0",


beautifulsoup4 and lxml are added as hard dependencies but are not referenced anywhere in src/. If they are not needed for this PR, consider removing them to reduce install size and supply-chain surface area.

lxml is a python-docx transitive dependency (used internally for XML parsing). beautifulsoup4 is pre-declared for the Scout scraping fallback planned in 02-07 — added an inline comment in pyproject.toml to make this explicit.

Copilot · 2026-02-26T10:46:20Z

src/ingot/agents/scout.py

 """
-Scout agent — discovers and qualifies startup leads from configured venues.
+Scout Agent — YC lead discovery via yc-oss JSON API.

-Pipeline:  discover → deduplicate → score
+Pipeline:
+  1. Fetch YC companies from yc-oss GitHub Pages API (batch or all)
+  2. Score each company against UserProfile skills using weighted formula
+  3. Validate output: reject company if >20% required fields are None (SCOUT-04)
+  4. Deduplicate against existing SQLite Lead records by email (SCOUT-06)
+  5. Persist top 10-20 leads sorted by score as status="discovered" (SCOUT-08)

-Tools the LLM can call during this pipeline:
-  - fetch_venue_page: HTTP GET a venue listing (YC, etc.)
-  - extract_company_list: parse HTML into structured company entries
+No LLM call — data is structured JSON; LLM is used in Research agent.
 """


This module no longer defines a ScoutAgent that implements the AgentBase contract (STEPS/run/run_step) and it no longer registers itself via register_agent("scout", …). This will break Orchestrator dispatch (get_agent("scout")) and existing tests that import ScoutAgent. Consider restoring the ScoutAgent wrapper (even if it just delegates to scout_run), or update the orchestrator/registry/tests consistently so Scout remains discoverable as an agent.

scout_run is registered via register_agent("scout", scout_run) so Orchestrator dispatch still resolves. Tests importing ScoutAgent by class name will need updating — tracked for 02-06. Function-based pattern chosen because Scout makes no LLM calls; the class wrapper added no value here.

Copilot · 2026-02-26T10:46:20Z

src/ingot/agents/scout.py

+    result = await session.execute(
+        select(Lead).where(Lead.person_email.ilike(person_email.strip()))
+    )


_is_duplicate calls session.exec(...), but the project uses sqlalchemy.ext.asyncio.AsyncSession, which does not provide .exec(). Use await session.execute(select(...)) and then inspect result.scalars().first() (or equivalent) to avoid an AttributeError at runtime.

Not applicable — the code uses await session.execute(select(...)) with .scalars().first(), which is the correct SQLAlchemy async API. No .exec() call exists in this file.

Copilot · 2026-02-26T10:46:21Z

src/ingot/agents/scout.py

+        await deps.session.commit()
+        await deps.session.refresh(lead)
+        persisted_leads.append(lead)
+


This persists leads with a commit per row inside the loop. That is slow and increases the chance of partial writes if an error occurs mid-run. Prefer adding all leads, then committing once (or in batches), with a rollback on failure.

Suggested change

await deps.session.commit()

await deps.session.refresh(lead)

persisted_leads.append(lead)

persisted_leads.append(lead)

if not persisted_leads:

return persisted_leads

try:

await deps.session.commit()

# Refresh all persisted leads to ensure they have up-to-date state

for lead in persisted_leads:

await deps.session.refresh(lead)

except Exception:

await deps.session.rollback()

raise

Fixed. Moved all session.add() calls into the loop, single commit() + refresh loop after. Wrapped in try/except with rollback() on failure.

yc.py: - Remove unused asyncio import - Replace assert isinstance() with explicit ValueError (includes URL in message) - Drop assert len > 100 — breaks batch/industry endpoints with < 100 results scorer.py: - Replace assert in ScoringWeights.__post_init__ with ValueError - Fix score_lead() mutable default: weights=None sentinel, resolved inside body - Add v2 TODO comment on _semantic_score for pre-fit vectorizer optimization scout.py: - Fix dedup bug: _is_duplicate queried Lead.person_email but received company_website; now correctly queries Lead.company_website - Fix ScoutDeps.weights: default_factory=lambda: DEFAULT_WEIGHTS → default_factory=ScoringWeights - Log silenced exceptions in batch fetch loop via structlog warning - Fix misleading _yc_* metadata comment (fields are stripped; Research re-fetches) - Move session.commit() outside per-row loop; single atomic commit with rollback schemas.py: - Rename body_must_mention_company → body_must_be_sufficiently_long (name now matches impl) profile.py: - Remove .doc from allowed suffixes (python-docx cannot parse binary .doc files) - Update error message to direct users to convert .doc → .docx writer.py (PR #6 carried fixes): - Replace lead.__dict__["_resolved_recipient_type"] with WriterDeps.resolved_recipient_type field - Replace datetime.utcnow() with datetime.now(timezone.utc) (Python 3.12+ deprecation) - Replace double session.commit() with flush() + single atomic commit Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

coder-ishan and others added 5 commits February 26, 2026 15:43

feat(02-02): rewrite scout agent — yc-oss API, dedup, status persistence

27e4f62

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Copilot AI review requested due to automatic review settings February 26, 2026 10:36

Copilot started reviewing on behalf of coder-ishan February 26, 2026 10:37 View session

coder-ishan and others added 3 commits February 26, 2026 16:09

wip: 02-core-pipeline paused at plan 5/7

6ee548c

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Copilot AI reviewed Feb 26, 2026

View reviewed changes

coder-ishan force-pushed the feature/phase-02-plan-02-scout branch from 5812bb0 to 2ce0f8f Compare February 26, 2026 11:02

coder-ishan and others added 3 commits February 26, 2026 16:55

resolve circular dependency

afc912f

uv lock

aed3859

	assert abs(total - 1.0) < 0.001, f"ScoringWeights must sum to 1.0, got {total}"
	if abs(total - 1.0) >= 0.001:
	raise ValueError(f"ScoringWeights must sum to 1.0, got {total}")

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coder-ishan commented Feb 26, 2026

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