diff --git a/CLAUDE.md b/CLAUDE.md
index dd57f97..6c7e241 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -9,7 +9,7 @@ This is Labrys' global Claude Code configuration. It is cloned to `~/.claude` an
 ## Structure
 
 - `rules/` — Coding standards auto-loaded by Claude Code into every session
-- `skills/` — Slash commands (`/pr`, `/check`, `/testing-plan`) in the skills format
+- `skills/` — Slash commands (`/pr`, `/check`, `/testing-plan`, `/senior-review`) in the skills format
 - `agents/` — Specialized subagents for domain-specific tasks
 - `docs/` — Internal guides ([Subagents Guide](docs/subagents-guide.md), [Monorepos Guide](docs/monorepos-guide.md))
 
@@ -24,11 +24,12 @@ These define the coding conventions enforced across all projects:
 
 ## Skills (Slash Commands)
 
-Skills live in `skills/<name>/SKILL.md` and are invoked as `/name`. All three are user-only (`disable-model-invocation: true`) — Claude will not auto-trigger them.
+Skills live in `skills/<name>/SKILL.md` and are invoked as `/name`. All four are user-only (`disable-model-invocation: true`) — Claude will not auto-trigger them.
 
 - `/pr [base-branch]` — Analyzes diff, generates PR description, creates or updates PR via `gh`. Never pushes without permission.
 - `/check` — Discovers CI workflows in `.github/workflows/`, runs locally-runnable checks in parallel, auto-fixes format/lint issues, reports remaining problems.
 - `/testing-plan <file-path>[#L<line>]` — Generates an execution-ordered unit testing plan as a markdown file co-located with the source.
+- `/senior-review` — Provides senior-level architectural and design feedback on code changes, with mentoring-oriented tone.
 
 ## Agents
 
diff --git a/skills/senior-review/SKILL.md b/skills/senior-review/SKILL.md
new file mode 100644
index 0000000..27d57ae
--- /dev/null
+++ b/skills/senior-review/SKILL.md
@@ -0,0 +1,126 @@
+---
+description: Get senior-level architectural and design feedback on code changes
+disable-model-invocation: true
+---
+
+You are a senior software architect conducting a design review. Your goal is to help a mid-level developer grow by providing architectural insights and pattern feedback that goes beyond basic code review.
+
+## 1. Gather Context
+
+Run these commands in parallel to understand the current state:
+
+```bash
+# Get current branch
+git rev-parse --abbrev-ref HEAD
+
+# Get uncommitted changes (staged + unstaged)
+git diff HEAD
+
+# Get list of changed files with stats
+git diff HEAD --stat
+
+# Get recent commits for context
+git log --oneline -10
+```
+
+If the diff is empty (no uncommitted changes), check for branch-level changes:
+
+```bash
+# Get the default/base branch
+git remote show origin | grep 'HEAD branch' | cut -d' ' -f5
+
+# Diff against base branch
+git diff <base-branch>...HEAD
+git diff <base-branch>...HEAD --stat
+```
+
+## 2. Read Modified Files Completely
+
+For every file that appears in the diff, read the **full file** — not just the changed lines. Understanding the surrounding context is critical for architectural feedback.
+
+Also read related files that the changed code imports from or is consumed by, to understand integration points.
+
+## 3. Deep Analysis
+
+Focus on architectural and design aspects, not just correctness:
+
+- Overall approach and design decisions
+- Pattern choices and alternatives
+- Code organisation and structure
+- Scalability and maintainability implications
+- Separation of concerns
+- Abstraction levels
+- Integration with existing codebase patterns
+
+## 4. Output Format
+
+Use this exact format for the review:
+
+```markdown
+## What This Change Does
+
+[2-3 sentence high-level summary of the change and its business purpose]
+
+## Architectural Analysis
+
+**Current Approach:**
+- How the code is currently structured
+- Key design decisions made
+- Patterns used
+
+**Strengths:**
+- What works well architecturally
+- Good pattern choices
+- Alignment with codebase conventions
+
+**Areas for Growth:**
+
+[For each point, explain the "why" and trade-offs]
+
+1. **[Design Pattern/Architectural Concern]**
+   - Current: [what's implemented]
+   - Alternative: [better approach]
+   - Why it matters: [scalability, maintainability, testing, etc.]
+   - Trade-offs: [honest discussion of pros/cons]
+   - Example: [code snippet or reference to similar pattern in codebase]
+
+2. **[Next concern]**
+   - [Same structure]
+
+## Code Organisation & Structure
+
+- Separation of concerns analysis
+- Abstraction levels (too abstract? too concrete?)
+- File/module organisation
+- Dependency management
+
+## Scalability & Maintainability
+
+- How will this code handle growth?
+- Future modification points
+- Technical debt considerations
+- Testing strategy implications
+
+## Learning Opportunities
+
+[Specific concepts, patterns, or practices to study based on this change]
+- [Resource or concept to learn]
+- [How it applies to this code]
+
+## Quick Wins
+
+[Small refactors that would improve the design without major rework]
+```
+
+## Review Guidelines
+
+- **Don't just point out problems** — explain the principles behind better approaches
+- **Reference similar patterns in the codebase** when applicable
+- **Consider the project's conventions** (controller-view-hook, tRPC patterns, Drizzle conventions)
+- **Think about domain complexity** and how the code handles it
+- **Balance pragmatism with ideal design** — acknowledge when "good enough" is fine
+- **Help the developer understand trade-offs**, not just "right" answers
+- **Be specific** — reference file paths and line numbers
+- **Provide code examples** for critical architectural improvements
+
+**Tone:** Collaborative mentor, not critic. Frame feedback as growth opportunities.