What is rt-config-id-stitching?

A configuration guide for RT 2.0 ID stitching, which combines real-time profile data when different identifiers are known to refer to the same person or entity.

Use it to configure how RT 2.0 merges profiles across identifiers.

It helps define the keys used to connect identifiers and the primary key used for each profile.

rt-config-id-stitching — Skill for Claude Code by treasure-data

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add treasure-data/td-skills --skill rt-config-id-stitching

Clone the repo

git clone --depth 1 https://github.com/treasure-data/td-skills

Made for: Claude Code.

Or install realtime-skills, the plugin that ships this one along with the rest of its 18 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/treasure-data/td-skills/rt-config-id-stitching/github.svg)](https://agentmods.dev/skills/treasure-data/td-skills/rt-config-id-stitching)

Your own site

<a href="https://agentmods.dev/skills/treasure-data/td-skills/rt-config-id-stitching"><img src="https://agentmods.dev/badge/skills/treasure-data/td-skills/rt-config-id-stitching/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/treasure-data/td-skills/rt-config-id-stitching"><img src="https://agentmods.dev/badge/skills/treasure-data/td-skills/rt-config-id-stitching.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,903 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00029	$0.02903
Opus 5.5	$0.00012	$0.01161
Sonnet 5.5	$0.00006	$0.00581
Haiku 4.5	$0.00003	$0.00290

Measured 1mo ago against content hash 4656462f46ea, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rt-config-id-stitching scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

realtime-skills/rt-config-id-stitching/SKILL.md · 412 lines

How it starts

The opening of the file, as written. The whole thing — 412 lines — stays where its author put it; the contents beside it link to each section on GitHub.

RT 2.0 ID Stitching Configuration

Configure profile merging across multiple identifiers in real-time.

Prerequisites

RT 2.0 enabled and event tables configured
Understanding of available ID fields in event data

ID Stitching Structure

id_stitching:
  primary_key: "td_client_id"        # Main unique identifier
  stitching_keys:                     # All identifiers for merging
    - name: "td_client_id"
      exclude_regex: "^test_.*"       # Filter invalid IDs
    - name: "email"
      exclude_regex: ".*@test\\.com$"
    - name: "user_id"
  ext_lookup_key: "email"             # Optional: External lookup

Primary Key

The main unique identifier for profiles:

primary_key: "td_client_id"

Requirements:

Must be one of the stitching_keys
Should be stable and unique
Available in most events
Not null for most users

Common choices:

td_client_id - TD cookie/device ID (recommended for web)
user_id - Your application's user ID
customer_id - CRM customer ID

Stitching Keys

All identifiers used to merge profiles:

stitching_keys:
  - name: "td_client_id"
    exclude_regex: "^test_.*"    # Exclude test IDs

  - name: "email"
    exclude_regex: ".*@(test|example)\\.com$"  # Exclude test emails

  - name: "user_id"
    exclude_regex: "^guest_"     # Exclude guest users

  - name: "phone_number"
    # No exclusion pattern

Key Selection:

Include all IDs present in event data
Order doesn't matter
Primary key must be in this list
Can add more keys later

Exclude Regex Patterns

Filter out invalid or test identifiers:

Common Patterns

# Test IDs
exclude_regex: "^test_.*"              # Starts with "test_"
exclude_regex: ".*_test$"              # Ends with "_test"

# Test emails
exclude_regex: ".*@test\\.com$"        # @test.com domain
exclude_regex: ".*@example\\.com$"     # @example.com domain
exclude_regex: ".*@(test|example|demo)\\.com$"  # Multiple test domains

# Guest/anonymous users
exclude_regex: "^guest_"               # Starts with "guest_"
exclude_regex: "^anon_"                # Starts with "anon_"
exclude_regex: "^(guest|anonymous)_"   # Starts with guest_ or anonymous_

# Development IDs
exclude_regex: "^dev_"                 # Development IDs
exclude_regex: "localhost"             # Localhost IDs

# Invalid formats
exclude_regex: "^$"                    # Empty strings
exclude_regex: "^null$"                # String "null"
exclude_regex: "^undefined$"           # String "undefined"

Read the full file on GitHub · 412 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago Changed · +53 lines 4656462f46ea
2mo ago First seen · 359 lines · 29 tokens per session scan A c56f271a2975

Subscribe to this mod's changes

rt-config-id-stitching is a skill published in the GitHub repository treasure-data/td-skills (22 stars, last pushed 5d ago), licensed Apache-2.0. It adds 29 tokens to every session and 2,903 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Analytics and metrics

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