Improved Cookstoves (TPDDTEC v3.1)

Overview

This Gold Standard methodology, Technologies and Practices to Displace Decentralized Thermal Energy Consumption version 3.1, applies to programmes and activities that reduce or displace greenhouse gas emissions from the thermal energy consumption of households and non-domestic premises. Eligible technologies and practices include improved cookstoves, heat retention cookers, solar cookers, bio-digesters, and safe water treatment technologies that lower fuel use. Each credit is a Verified Emission Reduction equal to one tonne of carbon dioxide equivalent reduced. Version 3.1 was published in August 2017 and was later succeeded by version 4.0, Reduced Emissions from Cooking and Heating.

Sources: methodology document · Gold Standard

01 · Roles

The workflow as an explicit directed graph. In Graph each column is one role, so you can see who acts at each step; every node names the org.broadlistening.policy.block.* def it resolves to plus its input and output record. Data flow switches to a lineage view that makes explicit what data each node needs and makes, with dependency arcs tracing every record back to the node that produced it. Hover to trace, click to inspect; revise edges (dashed) send work back.

03 · Generated lexicon records

The records this methodology compiles to, ready to write to a PDS. The first tabs are the new policy engine records; the ★ claim.activity tab and those after it are reused ATProto Collective Funding Ecosystem records (org.hypercerts.*): the issued hypercert batch, its rights, an example verification attachment and a retirement receipt.

{
  "$type": "org.broadlistening.policy.methodology",
  "code": "GS-TPDDTEC",
  "name": "Improved Cookstoves (TPDDTEC v3.1)",
  "registry": "Gold Standard (GS)",
  "sector": "Clean cooking",
  "creditType": "reduction",
  "status": "active",
  "version": "3.1",
  "roles": [
    {
      "id": "registry",
      "name": "Standard Registry",
      "permission": "Owns the policy, approves participants, anchors each issuance to its evidence."
    },
    {
      "id": "proponent",
      "name": "Project Proponent",
      "permission": "Registers the project and submits monitoring reports."
    },
    {
      "id": "vvb",
      "name": "Validation & Verification Body",
      "permission": "Independently validates the design and verifies monitored data."
    }
  ],
  "schemas": [
    "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.schema/gs-tpddtec-project-design",
    "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.schema/gs-tpddtec-monitoring-report"
  ],
  "graph": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.graph/gs-tpddtec",
  "issuesAs": "org.hypercerts.claim.activity",
  "workScope": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.hypercerts.workscope.cel/gs-tpddtec-scope",
  "rights": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.hypercerts.claim.rights/gs-tpddtec-rights",
  "createdAt": "2025-01-01T00:00:00.000Z"
}

04 · Schemas

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