diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
new file mode 100644
index 0000000..7f89a57
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,19 @@
+---
+name: Bug Report
+about: Report incorrect behavior
+title: "[BUG] "
+labels: bug
+---
+
+## What happened?
+
+## Expected behavior
+
+## Steps to reproduce
+1.
+2.
+
+## Environment
+- Python version (if applicable):
+- Node version (if applicable):
+- OS:
diff --git a/.github/ISSUE_TEMPLATE/config.yml b/.github/ISSUE_TEMPLATE/config.yml
new file mode 100644
index 0000000..f358724
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/config.yml
@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: Security vulnerability
+    url: https://github.com/CameronImmesoete/.github/blob/main/SECURITY.md
+    about: Report security issues privately via GitHub Security Advisories
+  - name: Note on contributions
+    url: https://github.com/CameronImmesoete/.github/blob/main/CONTRIBUTING.md
+    about: Issues and feedback are welcome. Pull requests are not accepted for this repository.
diff --git a/.github/ISSUE_TEMPLATE/feature_request.md b/.github/ISSUE_TEMPLATE/feature_request.md
new file mode 100644
index 0000000..fdb2235
--- /dev/null
+++ b/.github/ISSUE_TEMPLATE/feature_request.md
@@ -0,0 +1,10 @@
+---
+name: Feature Request
+about: Suggest an improvement or new feature
+title: "[FEATURE] "
+labels: enhancement
+---
+
+## Description
+
+## Use case
diff --git a/.github/copilot-instructions.md b/.github/copilot-instructions.md
new file mode 100644
index 0000000..f46e082
--- /dev/null
+++ b/.github/copilot-instructions.md
@@ -0,0 +1,15 @@
+# Copilot Instructions
+
+When assisting with code in this repository or any CameronImmesoete project:
+
+- Follow existing code style and patterns in the repo
+- Use type annotations (Python: mypy strict, TypeScript: strict mode)
+- Write tests for new functions and bug fixes
+- Use descriptive variable and function names
+- Prefer simple, readable code over clever abstractions
+- For Python repos: use uv for package management, ruff for linting, mypy for type checking, pytest for testing
+- For TypeScript repos: use npm, eslint, prettier, vitest
+- Never commit secrets, API keys, tokens, or credentials
+- Commit messages: imperative mood, under 72 characters, explain why not what
+- Python repos should configure mypy in pyproject.toml. The shared CI workflow runs `mypy .` which requires project-level configuration.
+- One PR per task
diff --git a/.github/copilot-review-skill.md b/.github/copilot-review-skill.md
new file mode 100644
index 0000000..8f7d52d
--- /dev/null
+++ b/.github/copilot-review-skill.md
@@ -0,0 +1,58 @@
+# Code Review Standards
+
+Use these criteria when reviewing pull requests across CameronImmesoete repositories.
+
+## Review Dimensions
+
+### 1. Correctness
+- Does the code do what the PR description claims?
+- Are edge cases handled (zero, negative, null, empty, boundary values)?
+- Are error paths tested, not just the happy path?
+- Do mathematical calculations match the documented formulas?
+
+### 2. Security
+- No secrets, tokens, or credentials in code, config, or comments
+- Input validation at system boundaries (user input, file uploads, API responses)
+- Dependencies are pinned to specific versions
+- No command injection, path traversal, or XSS vectors
+
+### 3. Test Coverage
+- New functions have unit tests covering happy path and edge cases
+- Bug fixes include a regression test that fails without the fix
+- Tests are deterministic (no flaky assertions, no timing dependencies)
+- Test names describe the behavior being verified
+
+### 4. Code Quality
+- Functions do one thing and are named for what they do
+- Variable names are descriptive (not `x`, `temp`, `data2`, `result`)
+- No dead code, no commented-out blocks, no unreachable branches
+- No copy-paste duplication across functions
+- Type annotations present where the language supports them
+
+### 5. Performance
+- No O(n^2) loops on unbounded input
+- Large files or datasets handled with streaming, not full memory load
+- No unnecessary network calls or filesystem I/O in hot paths
+- Database queries are indexed and bounded
+
+### 6. Documentation
+- Public APIs and exported functions have docstrings or JSDoc
+- Complex logic has inline comments explaining the reasoning (not restating the code)
+- README updated if user-facing behavior changes
+- No TODOs without a tracking reference (issue number or owner)
+
+### 7. Regression Risk
+- What existing behavior could this change break?
+- Are downstream consumers or dependents considered?
+- Is there a clear rollback path if problems surface after merge?
+- Were before/after behaviors verified for affected workflows?
+
+## Review Output Format
+
+For each issue found, include:
+- **Severity:** Critical / High / Medium / Low
+- **Location:** file path and line number
+- **Issue:** what is wrong and why it matters
+- **Suggestion:** specific fix or approach to resolve it
+
+Summarize with: total issue count by severity and an overall recommendation (approve, request changes, or comment only).
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..ca79ca5
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
diff --git a/.github/pull_request_template.md b/.github/pull_request_template.md
new file mode 100644
index 0000000..55c6a8f
--- /dev/null
+++ b/.github/pull_request_template.md
@@ -0,0 +1,13 @@
+## Summary
+<!-- What changed and why -->
+
+## Testing
+<!-- How was this verified? -->
+
+## Risk
+<!-- What could break? Low/Standard/Critical -->
+
+## Checklist
+- [ ] Tests pass locally
+- [ ] Lint passes
+- [ ] No new dependencies without justification
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..a937354
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,35 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
+      - name: Validate YAML syntax
+        run: |
+          pip install yamllint==1.35.1
+          yamllint -d '{extends: relaxed, rules: {line-length: disable}}' .github/workflows/
+
+      - name: Validate issue templates
+        run: |
+          fail=0
+          for f in .github/ISSUE_TEMPLATE/*.md; do
+            echo "Checking $f..."
+            head -1 "$f" | grep -q "^---" || { echo "FAIL: $f missing frontmatter"; fail=1; }
+          done
+          exit $fail
+
+      - name: Check profile README links
+        run: |
+          npx markdown-link-check@3.12.2 profile/README.md --retry
diff --git a/.github/workflows/python-ci.yml b/.github/workflows/python-ci.yml
new file mode 100644
index 0000000..32273a5
--- /dev/null
+++ b/.github/workflows/python-ci.yml
@@ -0,0 +1,68 @@
+name: Python CI (Reusable)
+
+on:
+  workflow_call:
+    inputs:
+      python-versions:
+        description: "Python versions to test"
+        required: false
+        type: string
+        default: '["3.11", "3.12"]'
+      run-tests:
+        description: "Whether to run pytest"
+        required: false
+        type: boolean
+        default: true
+      run-mypy:
+        description: "Whether to run mypy"
+        required: false
+        type: boolean
+        default: true
+      coverage-source:
+        description: "Source directory for coverage (callers should override for their src layout)"
+        required: false
+        type: string
+        default: "."
+
+permissions:
+  contents: read
+
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ${{ fromJson(inputs.python-versions) }}
+    env:
+      UV_PYTHON: ${{ matrix.python-version }}
+    steps:
+      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+
+      - name: Install uv
+        uses: astral-sh/setup-uv@38f3f104447c67c051c4a08e39b64a148898af3a # v4.2.0
+        with:
+          enable-cache: true
+
+      - name: Set up Python ${{ matrix.python-version }}
+        run: uv python install ${{ matrix.python-version }}
+
+      - name: Install dependencies
+        run: uv sync --extra dev
+
+      - name: Lint
+        run: uv run ruff check .
+
+      - name: Format check
+        run: uv run ruff format --check .
+
+      - name: Type check
+        if: inputs.run-mypy == true
+        run: uv run mypy .
+
+      - name: Test
+        if: inputs.run-tests == true
+        env:
+          COVERAGE_SOURCE: ${{ inputs.coverage-source }}
+        run: uv run pytest tests/ -v --tb=short --cov="$COVERAGE_SOURCE" --cov-report=term-missing
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..6c11f44
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,30 @@
+# OS
+.DS_Store
+Thumbs.db
+
+# IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# Python
+__pycache__/
+*.pyc
+*.pyo
+.venv/
+dist/
+*.egg-info/
+.mypy_cache/
+.ruff_cache/
+.pytest_cache/
+.coverage
+htmlcov/
+
+# Secrets
+.env
+.env.*
+!.env.example
+*.pem
+*.key
diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..220504a
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,31 @@
+# Agent Guidelines
+
+## PR Rules
+- One PR per branch. One branch per task.
+- Never close a PR to open a replacement. Fix in place.
+- Never push directly to main.
+- Squash merge only.
+- Branches auto-delete after merge.
+- Branch naming: `user/CameronImmesoete/<description>`
+
+## CI Requirements
+- All CI checks must pass before merge.
+- No `[skip ci]` commits unless pure documentation.
+- If CI is red on main, fix it before other work.
+
+## Security
+- Never commit secrets, API keys, tokens, or credentials.
+- Never add dependencies without justification.
+- Never force push to main.
+- Run tests before pushing.
+
+## Code Quality
+- Tests required for all new functions.
+- Lint must pass (ruff for Python, eslint for TypeScript).
+- Type checks must pass (mypy for Python, tsc for TypeScript).
+- Prefer simple, readable code over clever abstractions.
+
+## Shared Workflows
+- Python repos can use the reusable CI workflow: `uses: CameronImmesoete/.github/.github/workflows/python-ci.yml@main` # @main is used here because this IS the source repo; downstream callers should pin to a release tag or commit SHA
+  - Note: The doubled `.github` is intentional. The first is the repo name (`CameronImmesoete/.github`), the second is the workflows directory within it (`.github/workflows/`).
+- **Pinning policy:** `@main` is temporary during initial setup. Once the repo has a stable first release, all downstream callers must pin to a tagged release or specific commit SHA (e.g., `@v1.0.0` or `@abc1234`). Never use `@main` in production workflows. Update callers when the shared workflow changes by bumping the pinned reference.
diff --git a/CODE_OF_CONDUCT.md b/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..13fa51e
--- /dev/null
+++ b/CODE_OF_CONDUCT.md
@@ -0,0 +1,37 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, caste, color, religion, or sexual
+identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior:
+
+* The use of sexualized language or imagery, and sexual attention or advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a professional setting
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by opening a discussion on the relevant repository or contacting the maintainer through GitHub. All complaints will be reviewed and investigated promptly and fairly.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](https://www.contributor-covenant.org), version 2.1.
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..04e4f78
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,65 @@
+# Contributing
+
+This is a solo project maintained by [Cam Immesoete](https://github.com/CameronImmesoete). External contributions are not accepted. Pull requests from outside contributors will be closed.
+
+Found a bug or have a feature idea? [Open an issue](../../issues/new/choose).
+
+The standards below document how I contribute to my repos. They exist for consistency, not collaboration.
+
+## Branch Naming
+
+```
+user/CameronImmesoete/<descriptor>
+```
+
+Descriptors are kebab-case, 3-6 words, describe the outcome not the activity.
+
+## Pull Requests
+
+- One PR per branch. One branch per task.
+- All PRs start as drafts.
+- Never close a PR to open a replacement. Fix in place.
+- Squash merge only.
+- Branches auto-delete after merge.
+- Every PR includes: a summary, what was tested, and what could break.
+
+## Local Validation
+
+### For downstream Python repos:
+
+The commands below apply to Python repos that use the shared `python-ci.yml` workflow. This `.github` repository contains configuration only and has no Python code to validate.
+
+Run before every push in a downstream repo:
+
+```bash
+uv run ruff check .
+uv run ruff format --check .
+uv run mypy .
+uv run pytest tests/ -v --tb=short
+```
+
+All must pass. No exceptions.
+
+## Commit Messages
+
+Imperative mood, present tense, first line under 72 characters.
+
+Good: `Prevent division by zero in break-even calculator`
+Bad: `fix bug` / `Update stuff` / `hopefully this works`
+
+No hedging. No fix-the-fix chains. Squash before opening the PR.
+
+## Code Quality
+
+| Tool | Purpose | Config |
+|------|---------|--------|
+| uv | Package management | `pyproject.toml` |
+| ruff | Linting and formatting | `pyproject.toml` |
+| mypy | Static type checking (strict) | `pyproject.toml` |
+| pytest | Testing + coverage | `pyproject.toml` |
+
+Tests required for all new functions. No new dependencies without justification.
+
+## License
+
+This project is licensed under the MIT License. See [LICENSE](LICENSE) for details.
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..8cf30d0
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Cam Immesoete
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/SECURITY.md b/SECURITY.md
new file mode 100644
index 0000000..7b4a03e
--- /dev/null
+++ b/SECURITY.md
@@ -0,0 +1,7 @@
+# Security
+
+If you discover a security vulnerability in any of my projects, please report it responsibly.
+
+You can report vulnerabilities privately using GitHub's built-in [security advisory feature](https://docs.github.com/en/code-security/security-advisories/guidance-on-reporting-and-writing-information-about-vulnerabilities/privately-reporting-a-security-vulnerability) on the affected repository.
+
+Please do not open a public issue for security vulnerabilities. I will respond within 48 hours and work with you to understand and address the issue.
diff --git a/profile/README.md b/profile/README.md
new file mode 100644
index 0000000..66aa666
--- /dev/null
+++ b/profile/README.md
@@ -0,0 +1,28 @@
+# Hi, I'm Cam
+
+Software Engineer at Microsoft. Berkeley Haas EWMBA candidate. I like building things that sit at the intersection of software engineering and business analytics.
+
+## What I'm Working On
+
+**Interactive MBA Calculators.** Browser-based calculators powered by Pyodide (Python running in WebAssembly). The conjoint analysis tool handles full-profile generation, OLS regression, and attribute importance scoring in the browser with zero backend.
+
+- [marketing_calculators](https://github.com/CameronImmesoete/marketing_calculators): conjoint analysis, CLV, break-even, CAC, churn rate, NPS, ROMI
+- [macroeconomics_calculators](https://github.com/CameronImmesoete/macroeconomics_calculators): IS-LM, AD-AS, Phillips Curve, fiscal multiplier, exchange rate, BoP
+- [microeconomics_calculators](https://github.com/CameronImmesoete/microeconomics_calculators): supply and demand, elasticity, consumer/producer surplus, market equilibrium
+
+## Other Projects
+
+- [TensorGAN](https://github.com/CameronImmesoete/TensorGAN): generative adversarial network experiments
+- [STT-TTS-Demo](https://github.com/CameronImmesoete/STT-TTS-Demo): speech-to-text and text-to-speech demo
+- [cam-neurosity-tools](https://github.com/CameronImmesoete/cam-neurosity-tools): BCI tooling for Neurosity devices
+- [Cam-TensorFlow-Experiments](https://github.com/CameronImmesoete/Cam-TensorFlow-Experiments): TensorFlow experiments
+- [Pascal](https://github.com/CameronImmesoete/Pascal): Pascal language projects
+
+## Tech
+
+Python (numpy, pandas, scikit-learn, matplotlib), TypeScript, Pyodide. New repos use CI with ruff, mypy, and pytest.
+
+## Links
+
+- [immesoete.cam](https://immesoete.cam)
+- [LinkedIn](https://www.linkedin.com/in/cameronimmesoete/)