feat: implement agent-os standards system and feature planning tools

- Split CODING_GUIDELINES.md into 19 indexed standards files under .claude/standards/
  - 9 from CODING_GUIDELINES (conventions, powershell, security, api, git, gururmm)
  - 10 from session log tribal knowledge (syncro, ssh, gitea, python, client, gururmm)
- Add .claude/standards/index.yml for cheap relevance-based lookup
- Add /inject-standards command: load targeted standards per task instead of full guidelines
- Add /shape-spec command: pre-implementation spec for GuruRMM features (plan.md,
  shape.md, references.md, standards.md) with mandatory out-of-scope gate
- Add docs/tech-stack.md and docs/mission.md for ClaudeTools API
- Add projects/msp-tools/guru-rmm/docs/tech-stack.md and mission.md for GuruRMM
- Update CLAUDE.md commands table with /inject-standards and /shape-spec

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

.claude/commands/inject-standards.md

@@ -0,0 +1,94 @@
+# /inject-standards — Load relevant coding standards into context
+
+Loads one or more standards files from `.claude/standards/` and displays their full content.
+
+## Usage
+
+```
+/inject-standards                          — auto-select based on the current task
+/inject-standards powershell/execution-pattern   — load a specific standard by path
+/inject-standards "syncro billing comment"       — load standards relevant to a task description
+/inject-standards syncro/comment-dedup syncro/time-entry-protocol   — load multiple specific standards
+```
+
+## Procedure
+
+Follow these steps exactly when /inject-standards is invoked:
+
+### Step 1 — Parse $ARGUMENTS
+
+- If $ARGUMENTS is empty: proceed to Step 2 (auto-select based on conversation context).
+- If $ARGUMENTS contains one or more paths that match known standards slugs (e.g., `powershell/execution-pattern`, `syncro/comment-dedup`): skip Step 2, go directly to Step 3 with those paths.
+- If $ARGUMENTS is a task description (plain English, not a path): use it as the query in Step 2.
+
+### Step 2 — Auto-select relevant standards
+
+1. Read `D:/claudetools/.claude/standards/index.yml`.
+2. Review the descriptions for all entries.
+3. Select the 2–5 standards most relevant to either:
+   - The task description in $ARGUMENTS, or
+   - The current conversation context (what has the user been working on?).
+4. Prefer specificity: `syncro/comment-dedup` is more relevant than `conventions/no-emojis` for a Syncro billing task.
+5. Always include `conventions/no-emojis` when writing any output that will go into scripts, logs, or client-facing text.
+
+### Step 3 — Load and display the selected standards
+
+For each selected standard (in order of relevance):
+
+1. Read the file at `D:/claudetools/.claude/standards/<slug>.md`.
+2. Display a header:
+   ```
+   === STANDARD: <slug> ===
+   ```
+3. Display the full file content (including frontmatter).
+4. Add a blank line between standards.
+
+### Step 4 — Report
+
+After displaying all standards, print a one-line summary:
+
+```
+[INFO] Loaded N standards: <slug1>, <slug2>, ...
+```
+
+If auto-selection was used, briefly explain why each standard was chosen (one phrase per standard).
+
+## Examples
+
+**Specific standards:**
+```
+/inject-standards powershell/execution-pattern git/commit-style
+```
+Loads those two files directly and displays them.
+
+**Task description:**
+```
+/inject-standards "writing a PowerShell script to check Windows service status"
+```
+Would select: `powershell/execution-pattern`, `conventions/no-emojis`, `conventions/output-markers`
+
+**Syncro billing task:**
+```
+/inject-standards "billing Syncro ticket for emergency onsite"
+```
+Would select: `syncro/time-entry-protocol`, `syncro/comment-dedup`, `syncro/html-formatting`
+
+**GuruRMM agent feature:**
+```
+/inject-standards "adding Linux temperature collection to the agent"
+```
+Would select: `gururmm/platform-parity`, `gururmm/build-pipeline`, `conventions/no-emojis`
+
+**Empty (auto from context):**
+```
+/inject-standards
+```
+Reads the recent conversation, infers the task type, selects 2–5 most relevant standards.
+
+## Standards index location
+
+`D:/claudetools/.claude/standards/index.yml`
+
+## Standards files location
+
+`D:/claudetools/.claude/standards/<folder>/<name>.md`