[docs-linker] workshop docs: add gh-aw doc links

workshop/29-skills-and-domain-knowledge.md

@@ -23,7 +23,7 @@ You'll write a local `SKILL.md` that encodes a repeatable domain convention —
 ## :clipboard: Before You Start
 
 - You completed [Orchestrate Multiple Agentic Workflows](28-orchestrate-workflows.md).
-- You have at least one working agentic workflow you can edit and recompile.
+- You have at least one working [agentic workflow](https://github.github.com/gh-aw/introduction/overview/#what-are-agentic-workflows) you can edit and recompile.
 - You can compile workflows with `gh aw compile` from [Using `gh aw compile` to Catch Errors Early](side-quest-07-01-compile-workflow.md).
 
 ## Understand skills
@@ -42,7 +42,7 @@ Notice the shape: YAML frontmatter with `name` and `description`, followed by pl
 
 ## Steps
 
-### Install external skills with the frontmatter `skills:` key
+### Install external skills with the [frontmatter](https://github.github.com/gh-aw/reference/frontmatter/#frontmatter-skills-skills) `skills:` key
 
 To pull in a skill maintained elsewhere, add the top-level `skills:` array to your workflow frontmatter. The compiler installs it in the activation job before the agent runs — no manual `gh skill install` step needed:
 

workshop/side-quest-05-01-actions-power-user.md

@@ -9,7 +9,7 @@
 To get the most out of this fast-track guide, you should have already:
 
 - Completed [GitHub Actions in 5 Minutes](04-github-actions-intro.md) — or have hands-on experience authoring `.github/workflows/*.yml` files.
-- Understood the core Actions concepts: triggers (`on:`), jobs, steps, and runners.
+- Understood the core Actions concepts: triggers (`on:`), jobs, steps, and [runners](https://github.github.com/gh-aw/reference/self-hosted-runners/).
 - Optionally reviewed [What Are Agentic Workflows?](05-agentic-workflows-intro.md) for a beginner-friendly introduction before using this cheat sheet.
 
 ## :dart: What You'll Do

workshop/side-quest-06-01-install-troubleshooting.md

@@ -4,7 +4,7 @@
 
 > _Optional: use this guide if Step 6 install fails, then return to the main path._
 
-If `gh extension install github/gh-aw` fails, use the matching fix below and retry.
+If [`gh extension install github/gh-aw`](https://github.github.com/gh-aw/troubleshooting/common-issues/#extension-installation-fails) fails, use the matching fix below and retry.
 
 The diagram below shows how to identify your error type and apply the right fix:
 

workshop/side-quest-06-02-cca-codespace.md

@@ -17,7 +17,7 @@ When the Codespace finishes loading:
 
 1. Open the terminal tab.
 2. Run `gh auth status`.
-3. If needed, run `gh auth login` and complete browser sign-in.
+3. If needed, run `gh auth login` and complete [browser sign-in](https://github.github.com/gh-aw/reference/copilot-cloud-agent/#authentication).
 
 ## Install `gh-aw` in the Codespace terminal