Add A2AS Certificate

a2as.yaml

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+manifest:
+  version: "0.1.2"
+  schema: https://a2as.org/cert/schema
+  subject:
+    name: obrizan/doi-parser
+    source: https://github.com/obrizan/doi-parser
+    branch: dev
+    commit: "85086aa7"
+    scope: [crossref/__init__.py, scopus/__init__.py, assistant/__init__.py]
+  issued:
+    by: A2AS.org
+    at: '2026-01-26T16:11:42Z'
+  signatures:
+    digest: sha256:Wh8Zr7cunMu_B8in-asOJJin-x4P0FmHvYmW2vp6w3s
+    key: ed25519:adyLm-ZOE12G1dGYm7Fn2XITAG9CblU2Mg6PnnEpGfU
+    sig: ed25519:I-YXehNIyeVxiJZ5pBxjyQqR1LMEALHEefAZHl2rkW0DzcDUZkYeW6twoX3L3ZnjdN7h4cH43vhbPb57-rnQAg
+
+agents:
+  agent:
+    type: instance
+    models: [gpt-4.1]
+    tools: [find_doi_by_title_tool]
+    params:
+      name: Crossref search
+      output_type: ReferenceLookupResult
+      instructions: ['Find DOI from a title or partial citation using Crossref. If the user gives any reference-like string,
+          you must call this tool. Search by the paper/document title only. Do not search by a conference name or journal
+          name.']
+
+models:
+  gpt-4.1:
+    type: default
+    agents: [agent]
+
+tools:
+  find_doi_by_title_tool:
+    type: decorator
+    agents: [agent]
+
+imports:
+  Agent: agents.Agent
+  asyncio: asyncio
+  BaseModel: pydantic.BaseModel
+  csv: csv
+  find_doi_by_title: crossref.find_doi_by_title
+  first_true: more_itertools.first_true
+  function_tool: agents.function_tool
+  get_by_doi: scopus.get_by_doi
+  os: os
+  requests: requests
+  Runner: agents.Runner
+
+functions:
+  __init__:
+    type: sync
+    module: scopus
+    args: [self, data]
+  doi:
+    type: sync
+    module: scopus
+    args: [self]
+    params:
+      returns: str
+  find_doi_by_title:
+    type: sync
+    module: crossref
+    args: [title]
+  find_doi_by_title_tool:
+    type: tool
+    module: assistant
+    args: [title]
+    params:
+      returns: dict
+  format_citation:
+    type: sync
+    module: crossref
+    args: [data]
+    params:
+      returns: str
+  get_by_doi:
+    type: sync
+    module: scopus
+    args: [doi]
+  main:
+    type: async
+    module: assistant
+  scopus_id:
+    type: sync
+    module: scopus
+    args: [self]
+    params:
+      returns: str
+  url:
+    type: sync
+    module: scopus
+    args: [self]
+    params:
+      returns: str
+
+files:
+  references.txt:
+    type: literal
+    actions: [read]
+    params:
+      caller: [open]
+      alias: [f]
+  results.csv:
+    type: literal
+    actions: [write]
+    params:
+      caller: [open, csv.writer]
+      alias: [csvfile]
+
+networks:
+  api.crossref.org:
+    type: api
+    actions: [GET]
+    urls: [/works]
+    protocols: [https]
+    ports: ["443"]
+    params:
+      caller: [find_doi_by_title, get_by_doi]