feat: add Nitrosend integration for AI-native email sequencing (#202)

* feat: add customer-research skill (#186)

* feat: add customer-research skill (#185)

Adds a new skill for conducting and synthesizing customer research —
covering analysis of existing assets (transcripts, surveys, support
tickets, NPS) and digital watering hole research (Reddit, G2, forums,
communities, review sites). Includes persona generation framework,
JTBD extraction, VOC quote banking, and competitive intel from reviews.

Also adds a detailed source-guides reference with per-platform playbooks
(Reddit operators, G2 review tiers, LinkedIn job posting mining, etc.)
and 10 evals covering the main trigger scenarios.

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

* fix: address Codex review of customer-research skill

- Fix evals.json schema to match repo convention (skill_name wrapper,
  integer IDs, expected_output, files fields)
- Add product-marketing-context.md assertion to all evals
- Add 2 new evals: B2C drop-off scenario and zero-research bootstrap
- Collapse 'Where to Look' in SKILL.md to a decision table; detail
  lives in source-guides.md
- Add Research Quality Guardrails section (confidence labels,
  recency window, sample bias, minimum viable sample)
- Add Related Skills section cross-linking 7 downstream skills
- Expand source-guides.md with full B2C section (app stores,
  TikTok/Instagram, consumer Reddit, Discord)
- Add Source Reliability and Confidence Scoring reference guide

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

* fix: correct alphabetical ordering of customer-research in manifest and README

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

* docs: add customer-research to skills relationship diagram

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

* docs: move customer-research into Strategy column in diagram

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

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat: Resend CLI docs + Firehose integration (#188)

* feat: add Resend CLI docs and Firehose integration

- resend.md: update CLI availability (now official), add CLI install,
  setup, and common commands section
- firehose.md: new integration guide for real-time web content streaming
  API — query syntax, stream setup, marketing use cases (brand monitoring,
  competitive intel, lead triggers, PR/link building)
- REGISTRY.md: add firehose under Competitive Intelligence

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

* docs: document Claude Code dynamic content injection pattern

Add Claude Code-specific enhancement section to AGENTS.md explaining
the !`command` syntax for injecting shell output into skills at
invocation time. Marked as Claude Code-only to preserve cross-agent
compatibility of SKILL.md files.

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

* Revert "docs: document Claude Code dynamic content injection pattern"

This reverts commit 8e1ce7b363.

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

* docs: document Claude Code dynamic content injection pattern (#189)

Add Claude Code-specific enhancement section to AGENTS.md explaining
the !`command` syntax for injecting shell output into skills at
invocation time. Marked as Claude Code-only to preserve cross-agent
compatibility of SKILL.md files.

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat: add Introw PRM as partner ecosystem integration (#193)

Great contribution — clean integration guide with solid MCP tool coverage, and the cross-references into referral-program, revops, launch-strategy, and sales-enablement are well-placed. Thanks!

* feat: add Nitrosend integration for AI-native email sequencing

Adds Nitrosend as a tool option for teams building email sequences via
AI agents — no dashboard required, full MCP control.

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

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Tibo <72124096+CoopahG@users.noreply.github.com>

AGENTS.md

@@ -168,7 +168,7 @@ This repository includes a tools registry for agent-compatible marketing tools.
 
 - **Tool discovery**: Read `tools/REGISTRY.md` to see available tools and their capabilities
 - **Integration details**: See `tools/integrations/{tool}.md` for API endpoints, auth, and common operations
-- **MCP-enabled tools**: ga4, stripe, mailchimp, google-ads, resend, zapier, zoominfo, clay, supermetrics, coupler, outreach, crossbeam, composio
+- **MCP-enabled tools**: ga4, stripe, mailchimp, google-ads, resend, zapier, zoominfo, clay, supermetrics, coupler, outreach, crossbeam, introw, composio
 - **Composio** (integration layer): Adds MCP access to OAuth-heavy tools without native MCP servers (HubSpot, Salesforce, Meta Ads, LinkedIn Ads, Google Sheets, Slack, etc.). See `tools/integrations/composio.md`
 
 ### Registry Structure
@@ -219,3 +219,36 @@ When using any skill from this repository:
 ## Skill Categories
 
 See `README.md` for the current list of skills organized by category. When adding new skills, follow the naming patterns of existing skills in that category.
+
+## Claude Code-Specific Enhancements
+
+These patterns are **Claude Code only** and must not be added to `SKILL.md` files directly, as skills are designed to be cross-agent compatible (Codex, Cursor, Windsurf, etc.). Apply them locally in your own project's `.claude/skills/` overrides instead.
+
+### Dynamic content injection with `!`command``
+
+Claude Code supports embedding shell commands in SKILL.md using `` !`command` `` syntax. When the skill is invoked, Claude Code runs the command and injects the output inline — the model sees the result, not the instruction.
+
+**Most useful application: auto-inject the product marketing context file**
+
+Instead of every skill telling the agent "go check if `.agents/product-marketing-context.md` exists and read it," you can inject it automatically:
+
+```markdown
+Product context: !`cat .agents/product-marketing-context.md 2>/dev/null || echo "No product context file found — ask the user about their product before proceeding."`
+```
+
+Place this at the top of a skill's body (after frontmatter) to make context available immediately without any file-reading step.
+
+**Other useful injections:**
+
+```markdown
+# Inject today's date for recency-sensitive skills
+Today's date: !`date +%Y-%m-%d`
+
+# Inject current git branch (useful for workflow skills)
+Current branch: !`git branch --show-current 2>/dev/null`
+
+# Inject recent commits for context
+Recent commits: !`git log --oneline -5 2>/dev/null`
+```
+
+**Why this is Claude Code-only**: Other agents that load skills will see the literal `` !`command` `` string rather than executing it, which would appear as garbled instructions. Keep cross-agent skill files free of this syntax.