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awesome-copilot/skills/threat-model-analyst/references/skeletons/skeleton-architecture.md
Vijay Chegu afba5b86b8 Add threat-model-analyst skill: STRIDE-A threat modeling for repositories (#1177)
* Add threat-model-analyst skill: STRIDE-A threat modeling for repositories

Add a comprehensive threat model analysis skill that performs security audits
using STRIDE-A (STRIDE + Abuse) threat modeling, Zero Trust principles, and
defense-in-depth analysis.

Supports two modes:
- Single analysis: full STRIDE-A threat model producing architecture overviews,
  DFD diagrams, prioritized findings, and executive assessments
- Incremental analysis: security posture diff between baseline report and current
  code, producing standalone reports with embedded comparison

Includes bundled reference assets:
- Orchestrator workflows (full and incremental)
- Analysis principles and verification checklists
- Output format specifications and skeleton templates
- DFD diagram conventions and TMT element taxonomy

* Address PR review comments from Copilot reviewer

- Fix SKILL.md description: use single-quoted scalar, rename mode (2) to
  'Incremental analysis' with accurate description
- Replace 'Compare Mode (Deprecated)' sections with 'Comparing Commits or
  Reports' redirect (no deprecated language for first release)
- Fix skeleton-findings.md: move Tier 1 table rows under header, add
  CONDITIONAL-EMPTY block after END-REPEAT (matching Tier 2/3 structure)
- Fix skeleton-threatmodel.md and skeleton-architecture.md: use 4-backtick
  outer fences to avoid nested fence conflicts with inner mermaid fences
- Fix skeleton-incremental-html.md: correct section count from 9 to 8
- Fix output-formats.md: change status 'open' to 'Open' in JSON example,
  move stride_category warning outside JSON fence as blockquote
- Fix incremental-orchestrator.md: replace stale compare-output-formats.md
  reference with inline color conventions
- Regenerate docs/README.skills.md with updated description

* Address second round of Copilot review comments

- Fix diagram-conventions.md: bidirectional flow notation now uses <-->
  matching orchestrator.md and DFD templates
- Fix tmt-element-taxonomy.md: normalize SE.DF.SSH/LDAP/LDAPS to use
  SE.DF.TMCore.* prefix consistent with all other data flow IDs
- Fix output-formats.md: correct TMT category example from SQLDatabase
  to SQL matching taxonomy, fix component type from 'datastore' to
  'data_store' matching canonical enum, remove DaprSidecar from
  inbound_from per no-standalone-sidecar rule
- Fix 5 skeleton files: clarify VERBATIM instruction to 'copy the
  template content below (excluding the outer code fence)' to prevent
  agents from wrapping output in markdown fences
- Genericize product-specific names in examples: replace edgerag with
  myapp, BitNetManager with TaskProcessor, AzureLocalMCP with MyApp.Core,
  AzureLocalInfra with OnPremInfra, MilvusVectorDB with VectorDB

* Address third round of Copilot review comments

- Fix diagram-conventions.md: second bidirectional two-arrow pattern in
  Quick Reference section now uses <-->
- Fix incremental-orchestrator.md: renumber HTML sections 5-9 to 4-8
  matching skeleton-incremental-html.md 8-section structure
- Fix output-formats.md: add incremental-comparison.html to File List
  as conditional output for incremental mode
- Fix skeleton-inventory.md: add tmt_type, sidecars, and boundary_kind
  fields to match output-formats.md JSON schema example
2026-03-30 07:58:56 +11:00

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Markdown

# Skeleton: 0.1-architecture.md
> **⛔ Copy the template content below VERBATIM (excluding the outer code fence). Replace `[FILL]` placeholders. Do NOT add/rename/reorder sections.**
> **⛔ Key Components table columns are EXACTLY: `Component | Type | Description`. DO NOT rename to `Role`, `Change`, `Function`.**
> **⛔ Technology Stack table columns are EXACTLY: `Layer | Technologies` (2 columns). DO NOT add `Version` column or rename `Layer` to `Category`.**
> **⛔ Security Infrastructure Inventory and Repository Structure sections are MANDATORY — do NOT omit them.**
---
````markdown
# Architecture Overview
## System Purpose
[FILL-PROSE: 2-4 sentences — what is this system, what problem does it solve, who are the users]
## Key Components
| Component | Type | Description |
|-----------|------|-------------|
[REPEAT: one row per component]
| [FILL: PascalCase name] | [FILL: Process / Data Store / External Service / External Interactor] | [FILL: one-line description] |
[END-REPEAT]
<!-- ⛔ POST-TABLE CHECK: Verify Key Components:
1. Every component has PascalCase name (not kebab-case or snake_case)
2. Type is one of: Process / Data Store / External Service / External Interactor
3. Row count matches the number of nodes in the Component Diagram below
If ANY check fails → FIX NOW. -->
## Component Diagram
```mermaid
[FILL: Architecture diagram using service/external/datastore styles — NOT DFD circles]
```
## Top Scenarios
[REPEAT: 3-5 scenarios. First 3 MUST include sequence diagrams.]
### Scenario [FILL: N]: [FILL: Title]
[FILL-PROSE: 2-3 sentence description]
```mermaid
sequenceDiagram
[FILL: participants, messages, alt/opt blocks]
```
[END-REPEAT]
<!-- ⛔ POST-SECTION CHECK: Verify Top Scenarios:
1. At least 3 scenarios listed
2. First 3 scenarios MUST have sequenceDiagram blocks
3. Each sequence diagram has participant lines and message arrows
If ANY check fails → FIX NOW. -->
## Technology Stack
| Layer | Technologies |
|-------|--------------|
| Languages | [FILL] |
| Frameworks | [FILL] |
| Data Stores | [FILL] |
| Infrastructure | [FILL] |
| Security | [FILL] |
<!-- ⛔ POST-TABLE CHECK: Verify Technology Stack has all 5 rows filled. If Security row is empty, list security-relevant libraries/frameworks found in the code. -->
## Deployment Model
[FILL-PROSE: deployment description — ports, protocols, bind addresses, network exposure, topology (single machine / cluster / multi-tier)]
**Deployment Classification:** `[FILL: one of LOCALHOST_DESKTOP | LOCALHOST_SERVICE | AIRGAPPED | K8S_SERVICE | NETWORK_SERVICE]`
<!-- ⛔ DEPLOYMENT CLASSIFICATION RULES:
LOCALHOST_DESKTOP — Single-process console/GUI app, no network listeners (or localhost-only), single-user workstation. T1 FORBIDDEN.
LOCALHOST_SERVICE — Daemon/service binding to 127.0.0.1 only. T1 FORBIDDEN.
AIRGAPPED — No internet connectivity. T1 forbidden for network-originated attacks.
K8S_SERVICE — Kubernetes Deployment/StatefulSet with ClusterIP or LoadBalancer. T1 allowed.
NETWORK_SERVICE — Public API, cloud endpoint, internet-facing. T1 allowed.
This classification is BINDING on all subsequent prerequisite and tier assignments. -->
### Component Exposure Table
| Component | Listens On | Auth Required | Reachability | Min Prerequisite | Derived Tier |
|-----------|------------|---------------|--------------|------------------|-------------|
[REPEAT: one row per component from Key Components table]
| [FILL: component name] | [FILL: port/address or "N/A — no listener"] | [FILL: Yes (mechanism) / No] | [FILL: one of: External / Internal Only / Localhost Only / No Listener] | [FILL: one of closed enum — see rules below] | [FILL: T1 / T2 / T3] |
[END-REPEAT]
<!-- ⛔ EXPOSURE TABLE RULES:
1. Every component from Key Components MUST have a row.
2. "Listens On" = the actual bind address from code (e.g., "127.0.0.1:8080", "0.0.0.0:443", "N/A — no listener").
3. "Reachability" MUST be one of these 4 values (closed enum):
- `External` — reachable from public internet or untrusted network
- `Internal Only` — reachable only within a private network (K8s cluster, VNet, etc.)
- `Localhost Only` — binds to 127.0.0.1 or named pipe, same-host only
- `No Listener` — does not accept inbound connections (outbound-only, console I/O, library)
4. "Min Prerequisite" MUST be one of these values (closed enum):
- `None` — only valid when Reachability = External AND Auth Required = No
- `Authenticated User` — Reachability = External AND Auth Required = Yes
- `Internal Network` — Reachability = Internal Only AND Auth Required = No
- `Privileged User` — requires admin/operator role
- `Local Process Access` — Reachability = Localhost Only (same-host process can connect)
- `Host/OS Access` — Reachability = No Listener (requires filesystem, console, or debug access)
- `Admin Credentials` — requires admin credentials + host access
- `Physical Access` — requires physical presence
⛔ FORBIDDEN values: `Application Access`, `Host Access` (ambiguous — use `Local Process Access` or `Host/OS Access` instead)
5. "Derived Tier" is mechanically determined from Min Prerequisite:
- `None` → T1
- `Authenticated User`, `Privileged User`, `Internal Network`, `Local Process Access` → T2
- `Host/OS Access`, `Admin Credentials`, `Physical Access`, `{Component} Compromise`, or any `A + B` → T3
6. No threat or finding for this component may have a LOWER prerequisite than Min Prerequisite.
7. No threat or finding for this component may have a HIGHER tier (lower number) than Derived Tier.
8. This table is the SINGLE SOURCE OF TRUTH for prerequisite floors and tier ceilings. STRIDE and findings MUST respect it. -->
## Security Infrastructure Inventory
| Component | Security Role | Configuration | Notes |
|-----------|---------------|---------------|-------|
[REPEAT: one row per security-relevant component found in code]
| [FILL] | [FILL] | [FILL] | [FILL] |
[END-REPEAT]
## Repository Structure
| Directory | Purpose |
|-----------|---------|
[REPEAT: one row per key directory]
| [FILL: path/] | [FILL] |
[END-REPEAT]
````